https://gitlab.synchro.net/main/sbbs/-/merge_requests/331#note_4007

The user defaults code (in `useredit.cpp`) uses the merged result of the built-in libarchive-supported archive types (defined in `supported_archive_formats` in C) *and* the compressible file types configured in SCFG->File Options (readable from `file.ini`).I would suggest we use cfglib.js to get the sysop-configured archive types from the file.ini file (after support is added) and then combine them with the hard-coded list.
--- SBBSecho 3.20-Linux