https://gitlab.synchro.net/main/sbbs/-/commit/ce26c4f295652ac976e2684f
Modified Files:
	src/sbbs3/mailsrvr.c mailsrvr.h sbbs_ini.c src/sbbs3/scfg/scfgsrvr.c
Log Message:
Make the spamblock.cfg auto-added entries expirable (configurable duration)

By default, the duration is infinite, but some sysops may not want this
file to be ever-grower but rather periodically pruned by the new trashman
utility.

Sysop that don't use spambait.cfg won't benefit from this change.
--- SBBSecho 3.22-Linux