https://gitlab.synchro.net/main/sbbs/-/commit/77a771095c72121700e96ca2
Modified Files:
	src/xpdev/filewrap.c
Log Message:
Don't use flock() in sopen() since it ends up using non-OFD fcntl() locks

When OFD locks are available, that's what we should be using.
Otherwise, we suffer the horrible behavior of POSIX file/region locks and
a subsequent open/close of the file releases any/all locks on it.

This is currently in an !BSD block, which appears to include macOS, but
macOS *does* support OFD locks, so I'll be fixing that here shortly.
--- SBBSecho 3.23-Linux