OpenSSL's RC4, everything unsigned, utils, priv/pub for emulator, almost working

Now using the OpenSSL RC4 implementation.
All `char` are now unsigned (byte optimization; in Makefile for gcc as
well with `-funsigned-char`).
Some refactoring and style switching.
Nagle's algorithm is disabled in `rotmg.c`.
Some packet fixes.
Added the private and public RSA keys for the 22.1.0 server emulator
(for debugging purposes).