Bug 1429859 - Check mDoNotTryEarlyData in Do0RTT(). r=mcmanus

--HG--
extra : rebase_source : 799854532375d54765fd682cb9f648549b2c6b90

netwerk/protocol/http/nsHttpTransaction.cpp

@@ -2350,6 +2350,7 @@ bool
 nsHttpTransaction::Do0RTT()
 {
    if (mRequestHead->IsSafeMethod() &&
+       !mDoNotTryEarlyData &&
        (!mConnection ||
        !mConnection->IsProxyConnectInProgress())) {
      m0RTTInProgress = true;