merge rev 936, 939-943 from psychon branch:

- if a client connected before znc connected to irc and if it uses a wrong nick it
   wasnt informed of this -> fixed
- znc.cpp didnt work with --disable-modules
- some stuff which was already merged previously


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@800 726aef4b-f618-498e-8847-2d620e286838

znc.cpp

@@ -1187,7 +1187,9 @@ bool CZNC::ParseConfig(const CString& sConfig) {
 		return false;
 	}
 
+#ifdef _MODULES
 	GetModules().OnFinishedConfig();
+#endif
 
 	return true;
 }