fixes bug 246106 "Defensive (anti-phishing) auth prompts are displayed when they should not be displayed" r+sr=dveditz

netwerk/protocol/http/src/nsHttpChannel.cpp

@@ -2528,6 +2528,9 @@ nsHttpChannel::ConfirmAuth(const nsString &bundleKey, PRBool doYesNoPrompt)
     if (!prompt)
         return PR_TRUE;
 
+    // do not prompt again
+    mSuppressDefensiveAuth = PR_TRUE;
+
     PRBool confirmed;
     if (doYesNoPrompt) {
         PRInt32 choice;