log when imap urls are doomed, to help track down 221023 r/sr=mscott

mailnews/imap/src/nsImapIncomingServer.cpp

@@ -580,6 +580,7 @@ nsresult nsImapIncomingServer::DoomUrlIfChannelHasError(nsIImapUrl *aImapUrl, PR
       {
         nsresult res;
         *urlDoomed = PR_TRUE;
+        nsImapProtocol::LogImapUrl("dooming url", aImapUrl);
         
         mockChannel->Close(); // try closing it to get channel listener nulled out.