Add an entry into the table of supported OSes. Do not set _XOPEN_SOURCE
(contrary to OpenBSD) because that disables the u_short and u_long
typedefs, which are used unconditionally in various other header files.
Signed-off-by: NBenny Siegert <bsiegert@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>