docs: mention Open Group requirements

Commands cal col ipcrm ipcs kill line logger mesg more newgrp pg renice
has Open Group requirements.  Contributors need to be aware of them.

Reviewed-by: Adam Sampson <ats@offog.org>
Reviewed-by: Bruce Dubbs <bruce.dubbs@gmail.com>
Reviewed-by: Ángel González <ingenit@zoho.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/Documentation/howto-contribute.txt b/Documentation/howto-contribute.txt
index 5df6389abfb2d336b0d4e36c906301e83e8e1b5f..b66820ea5f44fb166e3155584bf8d57caa0caf04 100644 (file)
--- a/Documentation/howto-contribute.txt
+++ b/Documentation/howto-contribute.txt
@@ -117,6 +117,35 @@ Various notes
          multiple lines. In case the shorthand does not look good on one
          line use normal "if () else" syntax.
 
+Standards compliancy
+
+       Some of the commands maintained in this package have Open Group
+       requirements. These commands are;
+
+               cal
+               col
+               ipcrm
+               ipcs
+               kill
+               line
+               logger
+               mesg
+               more
+               newgrp
+               pg
+               renice
+
+       If you change these tools please make sure a change does not
+       conflict with the latest standard.  For example it is
+       recommendable not to add short command line options before they
+       are part of standard.  Introducing new long options is
+       acceptable.
+
+               The Single UNIX(TM) Specification, Version 2
+               Copyright (C) 1997 The Open Group
+
+               http://pubs.opengroup.org/onlinepubs/7908799/xcuix.html
+
 IRC channel
 
        * We have a new #util-linux IRC channel at freenode.net.