Module Name:	src
Committed By:	wrstuden
Date:		Fri Feb 26 23:38:56 UTC 1999

Modified Files:
	src/sys/kern: exec_script.c kern_exec.c vfs_vnops.c vnode_if.src
	src/sys/miscfs/union: union_subr.c
Log Message:
Modify VOP_CLOSE vnode op to always take a locked vnode. Change vn_close
to pass down a locked node. Modify union_copyup() to call VOP_CLOSE
locked nodes.

Also fix a bug in union_copyup() where a lock on the lower vnode would
only be released if VOP_OPEN didn't fail.