TW-1873: Specify different path to extensions/hooks directory

- Thanks to Eli.

src/Config.cpp

@@ -532,7 +532,11 @@ void Config::createDefaultData (const std::string& data)
 
     d.create ();
 
-    d += "hooks";
+    if (has ("hooks.location"))
+      d = Directory (get ("hooks.location"));
+    else
+      d += "hooks";
+
     d.create ();
   }
 }

src/Hooks.cpp

@@ -54,9 +54,19 @@ void Hooks::initialize ()
 {
   _debug = context.config.getInteger ("debug.hooks");
 
-  // Scan <rc.data.location>/hooks
-  Directory d (context.config.get ("data.location"));
-  d += "hooks";
+  // Scan <rc.hooks.location>
+  //      <rc.data.location>/hooks
+  Directory d;
+  if (context.config.has ("hooks.location"))
+  {
+    d = Directory (context.config.get ("hooks.location"));
+  }
+  else
+  {
+    d = Directory (context.config.get ("data.location"));
+    d += "hooks";
+  }
+
   if (d.is_directory () &&
       d.readable ())
   {

src/commands/CmdDiagnostics.cpp

@@ -307,8 +307,16 @@ int CmdDiagnostics::execute (std::string& output)
       << "\n\n";
 
   // Display hook status.
-  Path hookLocation (context.config.get ("data.location"));
-  hookLocation += "hooks";
+  Path hookLocation;
+  if (context.config.has ("hooks.location"))
+  {
+    hookLocation = Path (context.config.get ("hooks.location"));
+  }
+  else
+  {
+    hookLocation = Path (context.config.get ("data.location"));
+    hookLocation += "hooks";
+  }
 
   out << bold.colorize (STRING_CMD_DIAG_HOOKS)
       << '\n'