fix multiple connection protection code by making sure host name is set correctly when processing selected state url, fixes a regression by backing out one line of change r/sr/a=sspizer 215776

mailnews/imap/src/nsImapProtocol.cpp

@@ -1945,6 +1945,8 @@ void nsImapProtocol::ProcessSelectedStateURL()
   imapMessageFlagsType  msgFlags = 0;
   nsCString       urlHost;
   
+  (void) GetImapHostName(); // force m_hostName to get set.
+
   // this can't fail, can it?
   nsresult res;
   res = m_runningUrl->GetImapAction(&m_imapAction);