Document WALTSIG (and __WCLONE) and WALLSIG (__WALL). Restructure the

options documentation to make it easier to read.

lib/libc/sys/wait.2

@@ -1,4 +1,4 @@
-.\"	$NetBSD: wait.2,v 1.12 1999/12/02 21:42:40 kleink Exp $
+.\"	$NetBSD: wait.2,v 1.13 2001/07/18 19:12:21 thorpej Exp $
 .\"
 .\" Copyright (c) 1980, 1991, 1993, 1994
 .\"	The Regents of the University of California.  All rights reserved.
@@ -105,22 +105,43 @@ The
 .Fa status
 parameter is defined below.  The
 .Fa options
-parameter contains the bitwise OR of any of the following options.
-The
-.Dv WNOHANG
-option
-is used to indicate that the call should not block if
+parameter contains the bitwise OR of any of the following options:
+.Bl -tag -width WUNTRACED
+.It Dv WNOHANG
+This option is used to indicate that the call should not block if
 there are no processes that wish to report status.
-If the
-.Dv WUNTRACED
-option is set,
-children of the current process that are stopped
+.It Dv WUNTRACED
+If this option is set, children of the current process that are stopped
 due to a
 .Dv SIGTTIN , SIGTTOU , SIGTSTP ,
 or
 .Dv SIGSTOP
-signal also have
-their status reported.
+signal also have their status reported.
+.It Dv WALTSIG
+If this option is specified, the call will wait only for processes that
+are configured to post a signal other than
+.Dv SIGCHLD
+when they exit.  If
+.Dv WALTSIG
+is not specified, the call will wait only for processes that
+are configured to post
+.Dv SIGCHLD .
+.It Dv __WCLONE
+This is an alias for
+.Dv WALTSIG .
+It is provided for compatibility with the Linux
+.Xr clone 2
+API.
+.It Dv WALLSIG
+If this option is specified, the call will wait for all children regardless
+of what exit signal they post.
+.It Dv __WALL
+This is an alias for
+.Dv WALLSIG .
+It is provided for compatibility with the Linux
+.Xr clone 2
+API .
+.El
 .Pp
 If
 .Fa rusage