* "`internal(glob)`" - like `glob()`, but matches even internal-use
pages that globs do not usually match.
* "`title(glob)`", "`author(glob)`", "`authorurl(glob)`",
- "`license(glob)`", "`copyright(glob)`" - match pages that have the given
- metadata, matching the specified glob.
+ "`license(glob)`", "`copyright(glob)`", "`guid(glob)`"
+ - match pages that have the given metadata, matching the specified glob.
* "`user(username)`" - tests whether a modification is being made by a
user with the specified username. If openid is enabled, an openid can also
be put here. Glob patterns can be used in the username. For example,