The TracChangeset module shouldn't assume the authorizer is a !SubversionAuthorizer; use the `repos.authz` instead. 
The TracChangeset module shouldn't assume the authorizer is a !SubversionAuthorizer; use the `repos.authz` instead. 

This also eliminates the incompatibilities with the changes introduced by r4200 to its `__init__` method.


git-svn-id: f68c6b3b1dcd5d00a2560c384475aaef3bc99487@4206 af82e41b-90c4-0310-8c96-b1721e28e2e2

moreati/trac-gitsvn,dafrito/trac-mirror,dokipen/trac,moreati/trac-gitsvn,moreati/trac-gitsvn,exocad/exotrac,dafrito/trac-mirror,dafrito/trac-mirror,exocad/exotrac,exocad/exotrac,dokipen/trac,moreati/trac-gitsvn,dafrito/trac-mirror,dokipen/trac,exocad/exotrac