[tz] [PATCH] Update to cite current version of POSIX.1

[Sanjeev]

There has been a new Technical Corrigendum issued, and incorporated
in the 2016 Edition.  Slight reorder of the citation to conform to how
Opengroup likes it.
---
 Theory | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/Theory b/Theory
index 22164f4..f2a8dde 100644
--- a/Theory
+++ b/Theory
@@ -39,10 +39,11 @@ also available.  The tz code is upwards compatible with POSIX, an
 international standard for UNIX-like systems.  As of this writing, the
 current edition of POSIX is:
 
-  The Open Group Base Specifications Issue 7
-  IEEE Std 1003.1, 2013 Edition
-  <http://pubs.opengroup.org/onlinepubs/9699919799/>
-
+  IEEE Std 1003.1,2016 Edition
+  The Open Group Technical Standard Base Specifications, Issue 7
+  incorporates IEEE Std 1003.1-2008,
+               IEEE Std 1003.1-2008/Cor 1-2013,
+               IEEE Std 1003.1-2008/Cor 2-2016
 
 
 ----- Names of time zone rules -----
-- 
2.10.2