plan9: finalize documentation for next release

contrib/plan9/hgrc.d/9diff.rc

@@ -1,5 +1,7
+# The 9diff extdiff command generates diff(1) compatible output
+# suitable for use with the plumber(4).
 [extensions]
 extdiff =
 
 [extdiff]
 9diff = 9diff -cm $parent $child $root

contrib/plan9/hgrc.d/factotum.rc

@@ -1,2 +1,4
+# The factotum extension permits factotum(4) to act as an
+# authentication agent for HTTP repositories.
 [extensions]
 factotum =

contrib/plan9/proto

@@ -1,20 +1,23
 lib	- sys sys
 	mercurial	- sys sys
 		hgrc.d	- sys sys
 			9diff.rc	- sys sys
 			factotum.rc	- sys sys
 rc	- sys sys
 	bin	- sys sys
 		9diff	- sys sys
 		hg	- sys sys
 sys	- sys sys
 	lib	- sys sys
 		python	- sys sys
 			lib	- sys sys
 				python2.5	- sys sys
 					site-packages	- sys sys
 						hgext	- sys sys
 							+	- sys sys
 						mercurial	- sys sys
 							+	- sys sys
-						mercurial-2.1.1-py2.5.egg-info	- sys sys
+						mercurial-VERSION-py2.5.egg-info	- sys sys
+	src	- sys sys
+		cmd	- sys sys
+			mercurial	- sys sys