'svnsync' currently works by doing a commit, then copying revprops up a moment
later. The problem is that if something like mailer.py is installed, it (often)
will generate commit emails before the revprops are pushed. This results in
emails that have missing revprops -- no svn:log typically, and svn:author is
usually wrong too (usually the account running svnsync, rather than the proper
author.)
The solution here is to make svnsync notice if the server is 1.5, and if so, use
the new commit API to set revprops directly on the uncommitted txn, so that it
only needs to do *one* commit, just like 'svn commit' does.
Major