praekelt/vumi — pull request #534 by hodgestar (2013-05-08 14:36:10+00:00)
Title: Add post-validation hooks to vumi.config so that things like inter-field dependencies can be handled gracefully.

The immediate use-case is to be able to support `twisted_endpoint` in addition to `host` and `port` options for workers but a slightly more generic support for dependent fields would help us clean up lingering `validate_config` uses too.