O_EXLOCK stuff was introduced in June 1997, and backed out again in

November of that year; however, the corresponding man changes were
never backed out.
do that now, reversing -r1.3 of this file;
original pr and diff from peter philipp (this commit closes pr #4309);
i chose to revert -r1.3 rather than accept the new wording from peter;
thanks jaredy@ for tracking all this down, and supplying the ok...

src/lib/libutil/pw_lock.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: pw_lock.3,v 1.11 2005/03/07 23:01:40 jmc Exp $
+.\"	$OpenBSD: pw_lock.3,v 1.12 2005/07/29 09:08:34 jmc Exp $
 .\"
 .\" Copyright (c) 1995
 .\"	The Regents of the University of California.  All rights reserved.
@@ -58,10 +58,8 @@ functions allow a program to update the system passwd database.
 The
 .Fn pw_lock
 function attempts to lock the passwd database by creating the file
-.Pa /etc/ptmp
-with an exclusive lock (using
-.Xr flock 2
-semantics) and returns the file descriptor of that file.
+.Pa /etc/ptmp ,
+and returns the file descriptor of that file.
 If
 .Fa retries
 is greater than zero,