1.3.3dev: Support hook script environment configuration
1.3.3dev: Support hook script environment configuration

The feature is available in SVN 1.8+.

Refs #12771.


git-svn-id: 0d96b0c1a6983ccc08b3732614f4d6bfcf9cbb42@16342 af82e41b-90c4-0310-8c96-b1721e28e2e2

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