Change/Feature request : suppress CON code warnings about official GRP's CON file issues
Atomic version examples:
- the two "'else' with no 'if'" warnings in the GAME.CON
- two already defined sounds in the GAME.CON
- missing VOC files in USER.CON
Instead: Show only one message (FOOBAR.CON's checksum is known):
"Note: suppressing warnings about legacy CON code issues in well-known FOOBAR.CON"