handle git-notes breakage

The new git-notes feature in git 1.6.6 changes git log output in a way that
broke ikiwiki's parser if notes are added to commits.

I decided to deal with this by disabling notes when ikiwiki uses git,
by setting GIT_NOTES_REF="". AFAICS, looking up notes when dumping logs
will only waste time, since it does not currently seem to make sense for
ikiwiki to do anything with the notes.

IkiWiki/Plugin/git.pm

@@ -52,6 +52,9 @@ sub checkconfig () {
 		};
 	}
 
+	# Avoid notes, parser does not handle and they only slow things down.
+	$ENV{GIT_NOTES_REF}="";
+	
 	# Run receive test only if being called by the wrapper, and not
 	# when generating same.
 	if ($config{test_receive} && ! exists $config{wrapper}) {

debian/changelog

@@ -10,6 +10,9 @@ ikiwiki (3.20100104) UNRELEASED; urgency=low
   * websetup: Fix bug in array change detection.
   * linkmap: Simplify and improve browser compatability by using an img, 
     not object tag.
+  * git: The new git-notes feature in git 1.6.6 changes git log output
+    in a way that broke ikiwiki's parser if notes are added to commits.
+    Deal with this.
 
  -- Joey Hess <joeyh@debian.org>  Mon, 04 Jan 2010 12:53:24 -0500