https://gitlab.synchro.net/main/sbbs/-/commit/77c31de6b8e073473950fe37
Modified Files:
	src/xpdev/filewrap.h
Log Message:
Fix write-locks (deny-all/exclusive flocks) in sopen()

SH_DENYRW (deny-all) locks were broken 18 years ago with commit b866f1990a.

This fixes that by treating SH_COMPAT the same as SH_DENYNO (only), rather
than the same as SH_DENYNO or SH_DENYRW (and performing no locking).

This is likely the/a root-cause of some SBBS file corruption on *nix systems.
--- SBBSecho 3.21-Linux