When upgrading an environment, a sample configuration file is written besides the `trac.ini` in the `conf` folder.
When upgrading an environment, a sample configuration file is written
besides the `trac.ini` in the `conf` folder.

This makes it easier for Trac administrators to manually add 
the new configuration settings in the existing `trac.ini`.

It will be particularly useful for the 0.9 release, since
TracIni has evolved quite a bit since the 0.8 version ...



git-svn-id: 0d96b0c1a6983ccc08b3732614f4d6bfcf9cbb42@2170 af82e41b-90c4-0310-8c96-b1721e28e2e2

rbaumg/trac,rbaumg/trac,rbaumg/trac,rbaumg/trac