config: give it an includepaths option for looking for config files It is desirable to "derive" templates from the provided templates. A simple way to do this is e.g. %include map-cmdline.default in your own mapfile. Then you only have to redefine a few templates instead of copying over the whole thing. This %include mechanism already works for the built-in templates because by default it *only* looks for files that are in the same directory as the including mapfile. With this changeset, config grows an option to add more include paths for config files.