[PATCH 1/4] docs: mention Open Group requirements

[Sami Kerola <kerolasa@iki.fi>]

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

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
 Documentation/howto-contribute.txt | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/Documentation/howto-contribute.txt b/Documentation/howto-contribute.txt
index 5df6389..e0f8ad7 100644
--- 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 has 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 short options is
+	acceptable.
+
+		The Single UNIX® Specification, Version 2
+		Copyright © 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.
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