Add support for specifying the peer name for SSL connections in QNetworkAccessManager

QSslSocket has a setPeerName and the means to specify the peer name via the connectToHostEncrypted() function. Therefore it would be good to have similar functionality included in QNetworkAccessManager as well. This could be in either a complimentary setPeerName() function and/or with an extra parameter to connectToHostEncrypted to take the peer name.

This would enable more control over what the peer name is for those setting up webservers that require this to be set specifically.