Don't send login final hashes to everyone

Someone thought it was a good fucking idea to make logins NetXCmds. NetXCmds
are sent to everyone however. Thankfully logins are two passes. And the second
pass uses a salt based on the playernum. Therefore, in order to actually make
use of the final hash, you'd have to be the same playernum as who originally
sent it. Still a stupid exploit.

P.S. The netcode is LOL XD by VincyTM -Telos