Issue #1349 - Stop 2xx FTP responses from causing browser to hang.

LIST and RETR still appear to work as intended on ftp:// URLs after my changes. I wasn't able to test STOR because the browser doesn't appear to support FTP uploads at this time (although our FTP implementation appears perfectly capable of doing an FTP upload.)

If I understood the issue correctly, though, what we're doing is ensuring that we receive a preliminary 100 response from the FTP server for a given action before jumping to the 200 code describing what we do if the action was completed. Even though it makes no logical sense for a server to say an action was completed before it was initiated, someone could write a really annoying FTP server that takes advantage of this fact to crash the browser if they wanted.

netwerk/protocol/ftp/nsFtpConnectionThread.h

@@ -180,6 +180,12 @@ private:
     bool                mRetryPass;     // retrying the password
     bool                mStorReplyReceived; // FALSE if waiting for STOR
                                             // completion status from server
+    bool 		mRlist1xxReceived; // TRUE if the server has sent a
+                                           // LIST 1xx response.
+    bool		mRstor1xxReceived; // TRUE if the server has sent a
+    					   // STOR 1xx response.
+    bool		mRretr1xxReceived; // TRUE if the server has sent a
+					   // RETR 1xx response.
     nsresult            mInternalError; // represents internal state errors
     bool                mReconnectAndLoginAgain;
     bool                mCacheConnection;