Sync

- Implemented sync over TLS.
- Obsoleted the Socket code, replacing it with TLSClient, TLSServer.
- Added task server details to the 'diagnostics' command output.
- 'rc.debug.tls' controls the GnuTLS log level.
- Removed redundant cmake diagnostics.

src/commands/CmdSync.h

@@ -39,7 +39,7 @@ public:
   int execute (std::string&);
 
 private:
-  bool send (const std::string&, const Msg&, Msg&);
+  bool send (const std::string&, const std::string&, const Msg&, Msg&);
 };
 
 #endif