rewriting htdocs history

[Chris Shoemaker]

The trac timeline doesn't seem to work back past the time of the
import of htdocs.

On the hypothesis that this is because the import introduced revisions
whose dates were not monotonic, I propose we compress the revision
date of the htdocs to be the import date.  Something like:

$ svn propset svn:date "2006-01-16 20:30:00 -0500" --revprop -r 12376:12814

Are there any objections?

-chris