bug 1446352 TRR: make "only mode" not wait for CP confirmation r=mcmanus

... to avoid a catch-22 as CP needs name resolve to work.

MozReview-Commit-ID: DC1CjlUy4cJ

--HG--
extra : rebase_source : 3bc0f146071f04757d44b76f352e48b2abb4dad0

netwerk/dns/TRRService.cpp

@@ -99,7 +99,7 @@ bool
 TRRService::Enabled()
 {
   if (mConfirmationState == CONFIRM_INIT &&
-      (!mWaitForCaptive || mCaptiveIsPassed)) {
+      (!mWaitForCaptive || mCaptiveIsPassed || (mMode == MODE_TRRONLY))) {
     LOG(("TRRService::Enabled => CONFIRM_TRYING\n"));
     mConfirmationState = CONFIRM_TRYING;
   }