Don't disconnect unauthed clients which use something else than PASS, USER or NICK

git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1066 726aef4b-f618-498e-8847-2d620e286838

Client.cpp

@@ -116,8 +116,7 @@ void CClient::ReadLine(const CString& sData) {
 	}
 
 	if (!m_pUser) {
-		PutClient("ERROR :You need to send your password first!");
-		Close();
+		// Only NICK, USER and PASS are allowed before login
 		return;
 	}