https://gitlab.synchro.net/main/sbbs/-/commit/110f23bfdda7e6f7c96f8f1c
Modified Files:
	src/conio/cterm.c
Log Message:
Add some paranoia around size of macros.

Initially set 1MB as the max macro size.  I can't imagine wanting
one bigger than this, but I can bump it up if needed.

This likely fixes a vulerability where the BBS could at least crash
SyncTERM, and at most take control of the users system.  This
likely isn't the only place that needs bounds checks like this.
--- SBBSecho 3.23-Linux