[patch] queue.3: Comment out text for functions not in glibc (related: 6559169cac)

[Alejandro Colomar <colomar.6.4.3@gmail.com>]

===========
DESCRIPTION
===========

I'm documenting ``CIRCLEQ_*`` macros in queue.3.  While writing this, I
noticed that the documentation for some types of queues/lists talked
about swapping contents of two lists, but only for some of them.  I then
found that those macros (``*_SWAP``) don't exist in my system (Debian),
but exist in BSD, and I also found that a previous commit (6559169cac)
commented out a lot of the *_SWAP macros documentation, but not all, and
the reason was that they were not present on glibc.

I checked that I didn't have any of the *_SWAP macros on my glibc, so I
think this is probably that the commit simply forgot to comment some of
them.

=======
TESTING
=======

I tun ``sudo make`` and then visualized the man page with
``man 3 queue``, and the changes looked good.

I also noticed that the subsection ``Tail queue example`` contents were
wrong, as they contained calls to CIRCLEQ_* macros.  I will address that
in a future patch, before I submit the patch documenting CIRCLEQ_*.

________________________________________________________________________
P.S.:  I'd like to know, as my previous patch was oddly reformatted by
my mailer, if you can see it correctly this time.  I changed some,
configuration, so I hope it is fine.

=====
PATCH
=====

 From 2282ba2397e6ac7dca4cc09dfcb92ac524718f27 Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <colomar.6.4.3@gmail.com>
Date: Sun, 26 Jul 2020 23:36:42 +0200
Subject: [PATCH] queue.3: Comment out text for functions not in glibc
  (related: 6559169cac)

---
  man3/queue.3 | 26 +++++++++++++-------------
  1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/man3/queue.3 b/man3/queue.3
index 00e4b1958..ff1f42f3a 100644
--- a/man3/queue.3
+++ b/man3/queue.3
@@ -110,8 +110,8 @@
  .Nm TAILQ_LAST ,
  .Nm TAILQ_NEXT ,
  .Nm TAILQ_PREV ,
-.Nm TAILQ_REMOVE ,
-.Nm TAILQ_SWAP
+.Nm TAILQ_REMOVE
+.\" .Nm TAILQ_SWAP
  .Nd implementations of singly-linked lists, singly-linked tail queues,
  lists and tail queues
  .Sh SYNOPSIS
@@ -172,7 +172,7 @@ lists and tail queues
  .Fn LIST_NEXT "TYPE *elm" "LIST_ENTRY NAME"
  .\" .Fn LIST_PREV "TYPE *elm" "LIST_HEAD *head" "TYPE" "LIST_ENTRY NAME"
  .Fn LIST_REMOVE "TYPE *elm" "LIST_ENTRY NAME"
-.Fn LIST_SWAP "LIST_HEAD *head1" "LIST_HEAD *head2" "TYPE" "LIST_ENTRY 
NAME"
+.\" .Fn LIST_SWAP "LIST_HEAD *head1" "LIST_HEAD *head2" "TYPE" 
"LIST_ENTRY NAME"
  .\"
  .Fn TAILQ_CONCAT "TAILQ_HEAD *head1" "TAILQ_HEAD *head2" "TAILQ_ENTRY 
NAME"
  .Fn TAILQ_EMPTY "TAILQ_HEAD *head"
@@ -197,7 +197,7 @@ lists and tail queues
  .Fn TAILQ_NEXT "TYPE *elm" "TAILQ_ENTRY NAME"
  .Fn TAILQ_PREV "TYPE *elm" "HEADNAME" "TAILQ_ENTRY NAME"
  .Fn TAILQ_REMOVE "TAILQ_HEAD *head" "TYPE *elm" "TAILQ_ENTRY NAME"
-.Fn TAILQ_SWAP "TAILQ_HEAD *head1" "TAILQ_HEAD *head2" "TYPE" 
"TAILQ_ENTRY NAME"
+.\" .Fn TAILQ_SWAP "TAILQ_HEAD *head1" "TAILQ_HEAD *head2" "TYPE" 
"TAILQ_ENTRY NAME"
  .\"
  .Sh DESCRIPTION
  These macros define and operate on four types of data structures:
@@ -213,8 +213,8 @@ Insertion of a new entry after any element in the list.
  O(1) removal of an entry from the head of the list.
  .It
  Forward traversal through the list.
-.It
-Swapping the contents of two lists.
+.\" .It
+.\" Swapping the contents of two lists.
  .El
  .Pp
  Singly-linked lists are the simplest of the four data structures
@@ -1157,13 +1157,13 @@ The macro
  removes the element
  .Fa elm
  from the tail queue.
-.Pp
-The macro
-.Nm TAILQ_SWAP
-swaps the contents of
-.Fa head1
-and
-.Fa head2 .
+.\" .Pp
+.\" The macro
+.\" .Nm TAILQ_SWAP
+.\" swaps the contents of
+.\" .Fa head1
+.\" and
+.\" .Fa head2 .
  .Ss Tail queue example
  .Bd -literal
  TAILQ_HEAD(tailhead, entry) head =
-- 
2.27.0