Fix GoldSrc cvar descriptions using Source engine canonical text
GoldSrc cvarlists contain no description text, so Source engine
equivalents are used as fallbacks (css, dods, hl2dm, tf2) per the
Valve-Server-cvarlist repository.
63 fixes across 7 files:
- cs, cscz, dod, hldm, opfor, tfc: 9 fixes each (hostname, rcon_password,
sv_password, sv_cheats, log, sv_logecho, sv_logfile, sv_log_onefile,
mp_timelimit)
- ns: 9 fixes (hostname, rcon_password, sv_password, sv_cheats,
mp_limitteams, mp_timelimit, mp_logdetail, violence_hgibs, violence_agibs)