Buildsystem/Linux: Deprecate and remove use of FindTermcap.cmake - it was only used as a solution for older CentOS versions

Core/Genrevision: Move defines from SystemConfig.h file into into revision.h (might need a rename now?) and delete it.
This should remove the infamous "rebuild all of game plzkthx"-symptom when upgrading to newer revisions.

--HG--
branch : trunk

src/server/authserver/Main.cpp

@@ -22,13 +22,14 @@
 /// @{
 /// \file
 
+#include "revision.h"
+
 #include "Common.h"
 #include "Database/DatabaseEnv.h"
 #include "Database/PreparedStatements.h"
 
 #include "Configuration/Config.h"
 #include "Log.h"
-#include "SystemConfig.h"
 #include "Util.h"
 #include "SignalHandler.h"
 #include "RealmList.h"