This allows a plugin to manipulate the list of files that need to be
built when the wiki is refreshed. The function is passed a reference to an
-array of files that will be rebuilt, and can modify the array, either
-adding or removing files from it.
+array of files that will be rebuilt. It should return an array reference
+that is a modified version of its input. It can add or remove files from it.
### scan
The function is passed named parameters "page" and "content". Its return
value is ignored.
-### rescan
-
- hook(type => "rescan", id => "foo", call => \&scan);
-
-This hook is called after the scan hook has been run, as well as the
-preprocess hook in scan mode. It is used to collect additional
-metadata that depends on a first scan to have been performed already.
-
-The function is passed named parameters "page" and "content". Its return
-value is ignored.
-
### filter
hook(type => "filter", id => "foo", call => \&filter);