diff --git a/src/TLSClient.cpp b/src/TLSClient.cpp
index 1a9927daf..5516f4188 100644
--- a/src/TLSClient.cpp
+++ b/src/TLSClient.cpp
@@ -62,17 +62,17 @@ static void gnutls_log_function (int level, const char* message)
 ////////////////////////////////////////////////////////////////////////////////
 static int verify_certificate_callback (gnutls_session_t session)
 {
-  const TLSClient* client = (TLSClient*) gnutls_session_get_ptr (session);
+  const TLSClient* client = (TLSClient*) gnutls_session_get_ptr (session); // All
   return client->verify_certificate ();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 TLSClient::~TLSClient ()
 {
-  gnutls_deinit (_session);
-  gnutls_certificate_free_credentials (_credentials);
+  gnutls_deinit (_session); // All
+  gnutls_certificate_free_credentials (_credentials); // All
 #if GNUTLS_VERSION_NUMBER < 0x030300
-  gnutls_global_deinit ();
+  gnutls_global_deinit (); // All
 #endif
 
   if (_socket)
@@ -96,8 +96,8 @@ void TLSClient::debug (int level)
   if (level)
     _debug = true;
 
-  gnutls_global_set_log_function (gnutls_log_function);
-  gnutls_global_set_log_level (level);
+  gnutls_global_set_log_function (gnutls_log_function); // All
+  gnutls_global_set_log_level (level); // All
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -133,23 +133,23 @@ void TLSClient::init (
 
   int ret;
 #if GNUTLS_VERSION_NUMBER < 0x030300
-  ret = gnutls_global_init ();
+  ret = gnutls_global_init (); // All
   if (ret < 0)
-    throw format ("TLS init error. {1}", gnutls_strerror (ret));
+    throw format ("TLS init error. {1}", gnutls_strerror (ret)); // All
 #endif
 
-  ret = gnutls_certificate_allocate_credentials (&_credentials);
+  ret = gnutls_certificate_allocate_credentials (&_credentials); // All
   if (ret < 0)
-    throw format ("TLS allocation error. {1}", gnutls_strerror (ret));
+    throw format ("TLS allocation error. {1}", gnutls_strerror (ret)); // All
 
   if (_ca != "" &&
-      (ret = gnutls_certificate_set_x509_trust_file (_credentials, _ca.c_str (), GNUTLS_X509_FMT_PEM)) < 0)
-    throw format ("Bad CA file. {1}", gnutls_strerror (ret));
+      (ret = gnutls_certificate_set_x509_trust_file (_credentials, _ca.c_str (), GNUTLS_X509_FMT_PEM)) < 0) // All
+    throw format ("Bad CA file. {1}", gnutls_strerror (ret)); // All
 
   if (_cert != "" &&
       _key != "" &&
-      (ret = gnutls_certificate_set_x509_key_file (_credentials, _cert.c_str (), _key.c_str (), GNUTLS_X509_FMT_PEM)) < 0)
-    throw format ("Bad CERT file. {1}", gnutls_strerror (ret));
+      (ret = gnutls_certificate_set_x509_key_file (_credentials, _cert.c_str (), _key.c_str (), GNUTLS_X509_FMT_PEM)) < 0) // 3.1.11
+    throw format ("Bad CERT file. {1}", gnutls_strerror (ret)); // All
 
 #if GNUTLS_VERSION_NUMBER >= 0x02090a
   // The automatic verification for the server certificate with
@@ -158,28 +158,28 @@ void TLSClient::init (
   // manually after the gnutls handshake.
   gnutls_certificate_set_verify_function (_credentials, verify_certificate_callback);
 #endif
-  ret = gnutls_init (&_session, GNUTLS_CLIENT);
+  ret = gnutls_init (&_session, GNUTLS_CLIENT); // All
   if (ret < 0)
-    throw format ("TLS client init error. {1}", gnutls_strerror (ret));
+    throw format ("TLS client init error. {1}", gnutls_strerror (ret)); // All
 
   // Use default priorities unless overridden.
   if (_ciphers == "")
     _ciphers = "NORMAL";
 
   const char *err;
-  ret = gnutls_priority_set_direct (_session, _ciphers.c_str (), &err);
+  ret = gnutls_priority_set_direct (_session, _ciphers.c_str (), &err); // All
   if (ret < 0)
   {
     if (_debug && ret == GNUTLS_E_INVALID_REQUEST)
       std::cout << "c: ERROR Priority error at: " << err << '\n';
 
-    throw format (STRING_TLS_INIT_FAIL, gnutls_strerror (ret));
+    throw format (STRING_TLS_INIT_FAIL, gnutls_strerror (ret)); // All
   }
 
   // Apply the x509 credentials to the current session.
-  ret = gnutls_credentials_set (_session, GNUTLS_CRD_CERTIFICATE, _credentials);
+  ret = gnutls_credentials_set (_session, GNUTLS_CRD_CERTIFICATE, _credentials); // All
   if (ret < 0)
-    throw format ("TLS credentials error. {1}", gnutls_strerror (ret));
+    throw format ("TLS credentials error. {1}", gnutls_strerror (ret)); // All
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -190,7 +190,7 @@ void TLSClient::connect (const std::string& host, const std::string& port)
 
   // Store the TLSClient instance, so that the verification callback can access
   // it during the handshake below and call the verifcation method.
-  gnutls_session_set_ptr (_session, (void*) this);
+  gnutls_session_set_ptr (_session, (void*) this); // All
 
   // use IPv4 or IPv6, does not matter.
   struct addrinfo hints {};
@@ -233,17 +233,18 @@ void TLSClient::connect (const std::string& host, const std::string& port)
     throw format (STRING_CMD_SYNC_CONNECT, host, port);
 
 #if GNUTLS_VERSION_NUMBER >= 0x030109
-  gnutls_transport_set_int (_session, _socket);
+  gnutls_transport_set_int (_session, _socket); // 3.1.9
 #else
-  gnutls_transport_set_ptr (_session, (gnutls_transport_ptr_t) (intptr_t) _socket);
+  gnutls_transport_set_ptr (_session, (gnutls_transport_ptr_t) (intptr_t) _socket); // All
 #endif
 
   // Perform the TLS handshake
   do
   {
-    ret = gnutls_handshake (_session);
+    ret = gnutls_handshake (_session); // All
   }
-  while (ret < 0 && gnutls_error_is_fatal (ret) == 0);
+  while (ret < 0 && gnutls_error_is_fatal (ret) == 0); // All
+
   if (ret < 0)
     throw format (STRING_CMD_SYNC_HANDSHAKE, gnutls_strerror (ret));
 
@@ -257,14 +258,14 @@ void TLSClient::connect (const std::string& host, const std::string& port)
   {
     if (_debug)
       std::cout << "c: ERROR Certificate verification failed.\n";
-    throw format (STRING_TLS_INIT_FAIL, gnutls_strerror (ret));
+    throw format (STRING_TLS_INIT_FAIL, gnutls_strerror (ret)); // All
   }
 #endif
 
   if (_debug)
   {
 #if GNUTLS_VERSION_NUMBER >= 0x03010a
-    char* desc = gnutls_session_get_desc (_session);
+    char* desc = gnutls_session_get_desc (_session); // 3.1.10
     std::cout << "c: INFO Handshake was completed: " << desc << '\n';
     gnutls_free (desc);
 #else
@@ -276,7 +277,7 @@ void TLSClient::connect (const std::string& host, const std::string& port)
 ////////////////////////////////////////////////////////////////////////////////
 void TLSClient::bye ()
 {
-  gnutls_bye (_session, GNUTLS_SHUT_RDWR);
+  gnutls_bye (_session, GNUTLS_SHUT_RDWR); // All
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -296,11 +297,11 @@ int TLSClient::verify_certificate () const
   if (_trust == TLSClient::ignore_hostname)
     hostname = NULL;
 
-  int ret = gnutls_certificate_verify_peers3 (_session, hostname, &status);
+  int ret = gnutls_certificate_verify_peers3 (_session, hostname, &status); // 3.1.4
   if (ret < 0)
   {
     if (_debug)
-      std::cout << "c: ERROR Certificate verification peers3 failed. " << gnutls_strerror (ret) << '\n';
+      std::cout << "c: ERROR Certificate verification peers3 failed. " << gnutls_strerror (ret) << '\n'; // All
     return GNUTLS_E_CERTIFICATE_ERROR;
   }
 
@@ -312,11 +313,11 @@ int TLSClient::verify_certificate () const
   if (_debug && status)
     std::cout << "c: ERROR Certificate status=" << status << '\n';
 #else
-  int ret = gnutls_certificate_verify_peers2 (_session, &status);
+  int ret = gnutls_certificate_verify_peers2 (_session, &status); // All
   if (ret < 0)
   {
     if (_debug)
-      std::cout << "c: ERROR Certificate verification peers2 failed. " << gnutls_strerror (ret) << '\n';
+      std::cout << "c: ERROR Certificate verification peers2 failed. " << gnutls_strerror (ret) << '\n'; // All
     return GNUTLS_E_CERTIFICATE_ERROR;
   }
 
@@ -325,41 +326,41 @@ int TLSClient::verify_certificate () const
 
   if ((status == 0) && (_trust != TLSClient::ignore_hostname))
   {
-    if (gnutls_certificate_type_get (_session) == GNUTLS_CRT_X509)
+    if (gnutls_certificate_type_get (_session) == GNUTLS_CRT_X509) // All
     {
       const gnutls_datum* cert_list;
       unsigned int cert_list_size;
       gnutls_x509_crt cert;
 
-      cert_list = gnutls_certificate_get_peers (_session, &cert_list_size);
+      cert_list = gnutls_certificate_get_peers (_session, &cert_list_size); // All
       if (cert_list_size == 0)
       {
         if (_debug)
-          std::cout << "c: ERROR Certificate get peers failed. " << gnutls_strerror (ret) << '\n';
+          std::cout << "c: ERROR Certificate get peers failed. " << gnutls_strerror (ret) << '\n'; // All
         return GNUTLS_E_CERTIFICATE_ERROR;
       }
 
-      ret = gnutls_x509_crt_init (&cert);
+      ret = gnutls_x509_crt_init (&cert); // All
       if (ret < 0)
       {
         if (_debug)
-          std::cout << "c: ERROR x509 init failed. " << gnutls_strerror (ret) << '\n';
+          std::cout << "c: ERROR x509 init failed. " << gnutls_strerror (ret) << '\n'; // All
         return GNUTLS_E_CERTIFICATE_ERROR;
       }
 
-      ret = gnutls_x509_crt_import (cert, &cert_list[0], GNUTLS_X509_FMT_DER);
+      ret = gnutls_x509_crt_import (cert, &cert_list[0], GNUTLS_X509_FMT_DER); // All
       if (ret < 0)
       {
         if (_debug)
-          std::cout << "c: ERROR x509 cert import. " << gnutls_strerror (ret) << '\n';
-        gnutls_x509_crt_deinit(cert);
+          std::cout << "c: ERROR x509 cert import. " << gnutls_strerror (ret) << '\n'; // All
+        gnutls_x509_crt_deinit(cert); // All
         return GNUTLS_E_CERTIFICATE_ERROR;
       }
 
-      if (gnutls_x509_crt_check_hostname (cert, hostname) == 0)
+      if (gnutls_x509_crt_check_hostname (cert, hostname) == 0) // All
       {
         if (_debug)
-          std::cout << "c: ERROR x509 cert check hostname. " << gnutls_strerror (ret) << '\n';
+          std::cout << "c: ERROR x509 cert check hostname. " << gnutls_strerror (ret) << '\n'; // All
         gnutls_x509_crt_deinit(cert);
         return GNUTLS_E_CERTIFICATE_ERROR;
       }
@@ -370,13 +371,13 @@ int TLSClient::verify_certificate () const
 #endif
 
 #if GNUTLS_VERSION_NUMBER >= 0x030104
-  gnutls_certificate_type_t type = gnutls_certificate_type_get (_session);
+  gnutls_certificate_type_t type = gnutls_certificate_type_get (_session); // All
   gnutls_datum_t out;
-  ret = gnutls_certificate_verification_status_print (status, type, &out, 0);
+  ret = gnutls_certificate_verification_status_print (status, type, &out, 0); // 3.1.4
   if (ret < 0)
   {
     if (_debug)
-      std::cout << "c: ERROR certificate verification status. " << gnutls_strerror (ret) << '\n';
+      std::cout << "c: ERROR certificate verification status. " << gnutls_strerror (ret) << '\n'; // All
     return GNUTLS_E_CERTIFICATE_ERROR;
   }
 
@@ -412,7 +413,7 @@ void TLSClient::send (const std::string& data)
     int status;
     do
     {
-      status = gnutls_record_send (_session, packet.c_str () + total, remaining);
+      status = gnutls_record_send (_session, packet.c_str () + total, remaining); // All
     }
     while (errno == GNUTLS_E_INTERRUPTED ||
            errno == GNUTLS_E_AGAIN);
@@ -441,7 +442,7 @@ void TLSClient::recv (std::string& data)
   unsigned char header[4] {};
   do
   {
-    received = gnutls_record_recv (_session, header, 4);
+    received = gnutls_record_recv (_session, header, 4); // All
   }
   while (received > 0 &&
          (errno == GNUTLS_E_INTERRUPTED ||
@@ -469,7 +470,7 @@ void TLSClient::recv (std::string& data)
   {
     do
     {
-      received = gnutls_record_recv (_session, buffer, MAX_BUF - 1);
+      received = gnutls_record_recv (_session, buffer, MAX_BUF - 1); // All
     }
     while (received > 0 &&
            (errno == GNUTLS_E_INTERRUPTED ||
@@ -484,13 +485,13 @@ void TLSClient::recv (std::string& data)
     }
 
     // Something happened.
-    if (received < 0 && gnutls_error_is_fatal (received) == 0)
+    if (received < 0 && gnutls_error_is_fatal (received) == 0) // All
     {
       if (_debug)
-        std::cout << "c: WARNING " << gnutls_strerror (received) << '\n';
+        std::cout << "c: WARNING " << gnutls_strerror (received) << '\n'; // All
     }
     else if (received < 0)
-      throw std::string (gnutls_strerror (received));
+      throw std::string (gnutls_strerror (received)); // All
 
     buffer [received] = '\0';
     data += buffer;