I was just having an interesting discussion with a colleague of mine about licensing and configuration files. The problem is this:

Under the Apache License version 2 section 1 paragraph 8 it says that:

"Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files.

This produced a question whereby does making changes to a config file constitute as derived works and therefore your configuration files have to be put under the same license?

Also, is there a similar clause in the GPL?