Block pre-Subversion 1.5 clients

[Rainer Müller]

Ryan Schmidt wrote:
>> If v1.5 will help a lot of people, they should speak up so I can  
>> gauge the priority of the upgrade.
> 
> I think we should start using Subversion 1.5's merge tracking  
> (instead of svnmerge.py) on the 1.7 branch, when that's created.

Can we switch to the new merge tracking in the 1.7 branch and still use 
svnmerge.py on the older branches or would we need to convert this 
information?

Rainer