Certain servers, like smtp.live.com, will send a request for a
certificate even though they don't require one. In Schannel this
manifests as a warning/info status (SEC_I_INCOMPLETE_CREDENTIALS).
In the cases where it's not needed we should suppress the warning and
try to connect anyway, which is done by calling
InitializeSecurityContext again when we get the status.
Pick-to: 5.15
Change-Id: I3c48140f2949d8557251a49a2b66946da9395736
Reviewed-by: Joshua GPBeta <studiocghibli@gmail.com>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
2253d5eca6