It's based on [1], where it's reported to fix issues with older gnutls.
I tested what client hello packages Windows reports for different sets
of used protocol versions, and it always uses newest possible version.
There may be a concern about not using SSL3 client hello, which still
may negotiate newer protocol and was recommended for compatibility
reasons, but it's known to be problematic the other way those days and
recent gnutls won't use it by default anyway [2].

[1] http://us.battle.net/wow/en/forum/topic/20742995286?page=11
[2] https://gitlab.com/gnutls/gnutls/commit/25ed2750438178ff65d555a49212dc7b5a37c644Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>