As QAbstractSocket does not handle most cases for this socket type, we
should override skip() in QSslSocketPrivate implementation.
In unencrypted mode, QSslSocket should forward skipping to the plain
socket. If a connection is secure, we just need to check the connection
state.
Change-Id: I56602c6427b8617e8a9f453809a30fb2914ad798
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
ca49f133f0