kern/50845: Fix man page queue (3)

[joseyluis%gmail.com@localhost]

>Number:         50845
>Category:       kern
>Synopsis:       Fix man page queue (3)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 24 18:10:00 +0000 2016
>Originator:     Jose Luis Rodriguez Garcia
>Release:        Current and 7.0 at least
>Organization:
>Environment:
>Description:
The man page queue (3) wrongly states:
 All five structures support the following functionality:
....
2.   Insertion of a new entry before or after any element in the
                list.

I belive than SLIST and someone more don't allow add new entries before of any element in the list.
>How-To-Repeat:

>Fix:
--- queue.3.orig	2016-02-24 18:54:53.000000000 +0100
+++ queue.3	2016-02-24 18:56:36.000000000 +0100
@@ -256,7 +256,7 @@
 .It
 Insertion of a new entry at the head of the list.
 .It
-Insertion of a new entry before or after any element in the list.
+Insertion of a new entry after any element in the list.
 .It
 Removal of any entry in the list.
 .It