Document that SOCK_SEQPACKET is supported

share/man/man4/unix.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: unix.4,v 1.22 2011/05/19 21:16:45 riastradh Exp $
+.\"	$NetBSD: unix.4,v 1.23 2011/05/29 04:51:15 manu Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -49,7 +49,8 @@ mechanisms.
 The
 .Tn UNIX Ns -domain
 family supports the
-.Dv SOCK_STREAM
+.Dv SOCK_STREAM ,
+.Dv SOCK_SEQPACKET
 and
 .Dv SOCK_DGRAM
 socket types and uses
@@ -125,11 +126,14 @@ The
 .Tn UNIX Ns -domain
 protocol family comprises simple
 transport protocols that support the
-.Dv SOCK_STREAM
+.Dv SOCK_STREAM ,
+.Dv SOCK_SEQPACKET
 and
 .Dv SOCK_DGRAM
 abstractions.
 .Dv SOCK_STREAM
+and
+.Dv SOCK_SEQPACKET
 sockets also support the communication of
 .Ux
 file descriptors through the use of the
@@ -178,7 +182,8 @@ and
 The
 .Dv LOCAL_CREDS
 option may be enabled on a
-.Dv SOCK_DGRAM
+.Dv SOCK_DGRAM ,
+.Dv SOCK_SEQPACKET
 or a
 .Dv SOCK_STREAM
 socket.
@@ -208,6 +213,8 @@ option may be used with
 .Xr getsockopt 2
 to get the PID and effective user and group IDs of a
 .Dv SOCK_STREAM
+or
+.Dv SOCK_SEQPACKET
 peer when it did
 .Xr connect 2
 or