Script to backdate tags

After importing one of my projects from Arch, I wanted to add tags that
indicated its major releases.  Unfortunately, these tags for older
releases would show up before the more recent releases in the gitweb
output.  I searched in vain for a way of backdating tags, and finally
decided to make a script to do this for me.  Here it is.

This may run into issues if someone uses the "\" character in their tag
names, but I didn't want to bother fixing this until it was affirmed
that this script would be considered generally useful.

Michael Olson [off-list ref] writes:

This may run into issues if someone uses the "\" character in their
tag names, [snip].

In fact, this isn't the case after all.

-- 
       Michael Olson -- FSF Associate Member #652     |
 http://mwolson.org/ -- Jabber: mwolson_at_hcoop.net  |  /` |\ | | |
            Sysadmin -- Hobbies: Lisp, GP2X, HCoop    | |_] | \| |_|
Projects: Emacs, Muse, ERC, EMMS, ErBot, DVC, Planner |