do not call SSL_shutdown twice when the first call completed the shutdown already
do not call SSL_shutdown twice when the first call completed the shutdown already

maekitalo/tntnet,OlafRadicke/tntnet,maekitalo/tntnet,maekitalo/tntnet,OlafRadicke/tntnet,maekitalo/tntnet,OlafRadicke/tntnet,OlafRadicke/tntnet,maekitalo/tntnet,OlafRadicke/tntnet,maekitalo/tntnet