Improve format specifier for socket handle in Windows

Improve format specifier for socket handle in Windows

Socket is a handle on Windows, which is usually logged in hex.
Also an interesting value is INVALID_SOCKET, which is ~0.

PRIuPTR prints decimals, and for INVALID_SOCKET it prints something like

  2023-02-10 14:45:21 us=906000 write to TUN/TAP : Jrjestelmkutsulle
annettu data-alue on liian pieni.   (fd=18446744073709551615,code=122)

PRIxPTR prints hex, and INVALID_SOCKET looks a bit nicer:

  2023-02-10 15:17:11 us=828000 write to TUN/TAP : Jrjestelmkutsulle
annettu data-alue on liian pieni.   (fd=ffffffffffffffff,code=122)

Reported-by: Selva Nair <selva.nair@gmail.com>
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20230210133159.1336-1-lstipakov@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg26220.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>