Introduce commit message formatting guidelines.

This documents the recommended outline to use for commit message.  It also
covers information on special tags that can be used in commit messages, as well
as the template functionality that is available on bugs.digium.com.

Review: http://reviewboard.digium.com/r/96/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@165883 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/doxyref.h

@@ -31,6 +31,7 @@
  *
  * \section devpolicy Development and Release Policies
  * \arg \ref CodeGuide : The must-read document for all developers
+ * \arg \ref CommitMessages : Information on formatting and special tags for commit messages
  * \arg \ref ReleaseStatus : The current support level for various Asterisk releases
  * \arg \ref ReleasePolicies : Asterisk Release and Commit Policies
  * \arg \ref AstCREDITS : A Thank You to contributors (unfortunately out of date)
@@ -336,6 +337,96 @@
  * \verbinclude CODING-GUIDELINES
  */
 
+/*!
+ * \page CommitMessages Guidelines for Commit Messages
+ *
+ * \AsteriskTrunkWarning
+ *
+ * <hr/>
+ *
+ * \section CommitMsgFormatting Commit Message Formatting
+ *
+ * The following illustrates the basic outline for commit messages:
+ *
+  \verbatim
+  <One-liner summary of changes>
+ 
+  <Verbose description of the changes>
+
+  <Special Tags>
+  \endverbatim
+ *
+ * Some commit history viewers treat the first line of commit messages as the
+ * summary for the commit.  So, an effort should be made to format our commit
+ * messages in that fashion.  The verbose description may contain multiple 
+ * paragraphs, itemized lists, etc.
+ *
+ * Commit messages should be wrapped at 80 %columns.
+ *
+ * \note For trivial commits, such as "fix the build", or "fix spelling mistake",
+ *       the verbose description may not be necessary.
+ *
+ * <hr/>
+ *
+ * \section CommitMsgTags Special Tags for Commit Messages
+ *
+ * \subsection MantisTags Mantis (http://bugs.digium.com/)
+ *
+ * To have a commit noted in an issue, use a tag of the form: 
+ * \arg (issue #1234)
+ *
+ * To have a commit automatically close an issue, use a tag of the form:
+ * \arg (closes issue #1234)
+ *
+ * When making a commit for a mantis issue, it is easiest to use the
+ * provided commit %message template functionality.  It will format the
+ * special tags appropriately, and will also include information about who
+ * reported the issue, which patches are being applied, and who did testing.
+ * 
+ * Assuming that you have bug marshal access (and if you have commit access,
+ * it is pretty safe to assume that you do), you will find the commit %message
+ * template section directly below the issue details section and above the
+ * issue relationships section.  You will have to click the '+' next to
+ * "Commit message template" to make the contents of the section visible.
+ *
+ * Here is an example of what the template will generate for you:
+ *
+  \verbatim
+  (closes issue #1234)
+  Reported by: SomeGuy
+  Patches:
+       fix_bug_1234.diff uploaded by SomeDeveloper (license 5678)
+  \endverbatim
+ *
+ * If the patch being committed was written by the person doing the commit,
+ * and is not available to reference as an upload to the issue, there is no
+ * need to include something like "fixed by me", as that will be the default
+ * assumption when a specific patch is not referenced.
+ *
+ * \subsection ReviewBoardTags Review Board (http://reviewboard.digium.com/)
+ *
+ * To have a commit set a review request as submitted, include the full URL
+ * to the review request.  For example:
+ * \arg Review: %http://reviewboard.digium.com/r/95/
+ *
+ * <hr/>
+ *
+ * \section CommitMsgSvnmerge Commit Messages with svnmerge
+ *
+ * When using the svnmerge tool for merging changes between branches, use the
+ * commit %message generated by svnmerge.  The '-f' option to svnmerge allows
+ * you to specify a file for svnmerge to write out a commit %message to.  The
+ * '-F' option to svn commit allows you to specify a file that contains the
+ * commit %message.
+ *
+ * If you are using the expect script wrappers for svnmerge from repotools,
+ * a commit %message is automatically placed in the file '../merge.msg'.
+ *
+ * For more detailed information about working with branches and merging,
+ * see the following page on %asterisk.org:
+ * \arg http://www.asterisk.org/developers/svn-branching-merging
+ */
+
 /*! 
  * \page AstAPI Asterisk API
  * \section Asteriskapi Asterisk API