A machine whose address or hardware id is in bans.txt, or that was dropped
for cheating, was told the game is not open when it tried to join again;
it is told it is kept out (_rejection_code_blacklisted_machine), as at the
ban itself.
(cherry picked from commit 73c78610c67cd3827592673f1b06a1d38babe4ac)
Adapted: without the dedicated server's drop function it was declared
beside (in a server/ folder, not taken), and a machine kept out by a
vote (OpenCE's network_votekick.c) is told it is kept out too.
(cherry picked from commit c0191dd9beb4bfd26dd73ba0923cb7edeea44d49)
Milenko
2db3174366