man-pages-posix-2013-a.lsm: Add

Signed-off-by: Michael Kerrisk (man-pages) <mtk.manpages@gmail.com>
diff --git a/man-pages-posix-2017/man-pages-posix-2013-a.lsm b/man-pages-posix-2017/man-pages-posix-2013-a.lsm
new file mode 100644
index 0000000..ec62d8c
--- /dev/null
+++ b/man-pages-posix-2017/man-pages-posix-2013-a.lsm
@@ -0,0 +1,11 @@
+Begin3
+Title:          Section 0p, 1p, and 3p man pages (the POSIX.1-2017 man-pages) for Linux
+Version:        2017-a
+Entered-date:   2020-11-04
+Description:    POSIX manual pages
+Keywords:       man pages
+Author:         The Open Group
+Maintained-by:  Michael Kerrisk <mtk.manpages@gmail.com>
+Primary-site:   https://www.kernel.org/pub/linux/docs/man-pages/man-pages-posix/
+Copying-policy: See the file POSIX-COPYRIGHT;
+End