Fix some startup error messages

We should *never* use exit(0); on error and it doesn't hurt if our error
messages use a similar wording.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1585 726aef4b-f618-498e-8847-2d620e286838

Socket.cpp

@@ -48,7 +48,7 @@ CSockManager::CSockManager() : TSocketManager<CZNCSock>() {
 	int i = ares_init(&GetAres());
 	if (i != ARES_SUCCESS) {
 		CUtils::PrintError("Could not initialize c-ares: " + CString(ares_strerror(i)));
-		exit(0);
+		exit(-1);
 	}
 	DEBUG("Successfully initialized c-ares");
 #endif