simpleq.3, stailq.3, queue.7, SIMPLEQ_*.3: Document SIMPLEQ_*() as an alias to STAILQ_*() macros

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/SIMPLEQ_EMPTY.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_ENTRY.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_FIRST.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_FOREACH.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_HEAD.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_HEAD_INITIALIZER.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_INIT.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_INSERT_AFTER.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_INSERT_HEAD.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_INSERT_TAIL.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_NEXT.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_REMOVE.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/SIMPLEQ_REMOVE_HEAD.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/simpleq.3

@@ -0,0 +1 @@
+.so man3/stailq.3

man3/stailq.3

@@ -31,6 +31,26 @@
 .\"
 .TH STAILQ 3 2020-10-21 "GNU" "Linux Programmer's Manual"
 .SH NAME
+.\"SIMPLEQ_CONCAT,
+SIMPLEQ_EMPTY,
+SIMPLEQ_ENTRY,
+SIMPLEQ_FIRST,
+SIMPLEQ_FOREACH,
+.\"SIMPLEQ_FOREACH_FROM,
+.\"SIMPLEQ_FOREACH_FROM_SAFE,
+.\"SIMPLEQ_FOREACH_SAFE,
+SIMPLEQ_HEAD,
+SIMPLEQ_HEAD_INITIALIZER,
+SIMPLEQ_INIT,
+SIMPLEQ_INSERT_AFTER,
+SIMPLEQ_INSERT_HEAD,
+SIMPLEQ_INSERT_TAIL,
+.\"SIMPLEQ_LAST,
+SIMPLEQ_NEXT,
+SIMPLEQ_REMOVE,
+.\"SIMPLEQ_REMOVE_AFTER,
+SIMPLEQ_REMOVE_HEAD,
+.\"SIMPLEQ_SWAP,
 STAILQ_CONCAT,
 STAILQ_EMPTY,
 STAILQ_ENTRY,
@@ -96,6 +116,8 @@ STAILQ_REMOVE_HEAD,
 .\" .BI "void STAILQ_SWAP(STAILQ_HEAD *" head1 ", STAILQ_HEAD *" head2 ,
 .\" .BI "                          STAILQ_ENTRY " NAME );
 .fi
+.IR Note :
+Identical macros prefixed with SIMPLEQ instead of STAILQ exist; see NOTES.
 .SH DESCRIPTION
 These macros define and operate on singly linked tail queues.
 .PP
@@ -299,6 +321,15 @@ fixes this limitation by allowing
 .I var
 to safely be removed from the list and freed from within the loop
 without interfering with the traversal.
+.SH NOTES
+Some BSDs provide SIMPLEQ instead of STAILQ.
+They are identical, but for historical reasons
+they were named differently on different BSDs.
+STAILQ originated on FreeBSD, and SIMPLEQ originated on NetBSD.
+For compatibility reasons, some systems provide both sets of macros.
+Glibc provides both STAILQ and SIMPLEQ,
+which are identical except for a missing SIMPLEQ equivalent to
+.BR STAILQ_CONCAT ().
 .SH EXAMPLES
 .EX
 #include <stddef.h>

man7/queue.7

@@ -138,6 +138,15 @@ Not in POSIX.1, POSIX.1-2001, or POSIX.1-2008.
 Present on the BSDs.
 .I <sys/queue.h>
 macros first appeared in 4.4BSD.
+.SH NOTES
+Some BSDs provide SIMPLEQ instead of STAILQ.
+They are identical, but for historical reasons
+they were named differently on different BSDs.
+STAILQ originated on FreeBSD, and SIMPLEQ originated on NetBSD.
+For compatibility reasons, some systems provide both sets of macros.
+Glibc provides both STAILQ and SIMPLEQ,
+which are identical except for a missing SIMPLEQ equivalent to
+.BR STAILQ_CONCAT ().
 .SH SEE ALSO
 .BR circleq (3),
 .BR insque (3),