[PATCH] git-cvsimport-script: handling of tags

This patch changes git-cvsimport-script so that it creates tag objects
instead of refs to commits, and adds an option, -u, to convert
underscores in branch and tag names to dots (since CVS doesn't allow
dots in branches and tags.)

Signed-off-by: Junio C Hamano <junkio@cox.net>

Documentation/git-cvsimport-script.txt

@@ -44,6 +44,9 @@ OPTIONS
 	to avoid noisy changesets. Highly recommended, but off by default
 	to preserve compatibility with early imported trees. 
 
+-u::
+	Convert underscores in tag and branch names to dots.
+
 -o <branch-for-HEAD>::
 	The 'HEAD' branch from CVS is imported to the 'origin' branch within
 	the git repository, as 'HEAD' already has a special meaning for git.