https://gitlab.synchro.net/main/sbbs/-/commit/caea73577c5d996d32206cf0
Modified Files:
src/doors/syncduke/README.md
Log Message:
syncduke: README -- document third-party map / add-on GRP setup

Expand the brief lobby-picker blurb into a proper setup section: where the files go, the [map:<Name>] syntax (file/grp/con and the engine options they
map to), path resolution, and the picker/multiplayer behavior -- and make the base-GRP requirement unmistakable: user maps and add-on GRPs need a full (registered) GRP, NOT the shareware one. The engine keys its edition off the base GRP's CRC and the shareware edition has no user-map path -- a -map launch dies with "Internal Map ... not found in Shareware grp pack!" -- and the lobby doesn't check, so shareware installs shouldn't configure [map:*] entries at all. Also un-wedges the old blurb from between the command-line argument tables.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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