[c12678] Improve alcohol handling

Fixes client crash when using Barbershop Chair while drunk

Also allow .mod drunk to modify the drunk state of the targeted player

Signed-off-by: stfx <stfx@hotmail.de>

(based on commit [12487] - 4ece3ed)

Signed-off-by: Dramacydal <PulLumBerMal@gmail.com>