open https://gitlab.synchro.net/main/sbbs/-/issues/940

Take a look through https://kuehlbox.wtf/wiki/doku.php?id=customizing:display_file_conventions#pcboard_macros to see what's missing in Synchronet, if anything.

Add aliases for those that already exist, but under a different code (e.g. BYTERATIO as alias for UDR).
--- SBBSecho 3.28-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)