This is used to get the page creation time for a file from the RCS, by looking
it up in the history.
-It's ok if this is not implemented, and throws an error.
-
If the RCS cannot determine a ctime for the file, return 0.
#### `rcs_getmtime($)`
for the RCS to limit changes to safe changes, and die if a change would
be unsafe to revert.
-#### `rcs_revert(@)`
+#### `rcs_revert($)`
This is called by the revert web interface. It is passed a named
parameter rev that is the RCS-specific change ID to revert.
-Addition named parameters: `message`, and `session` (optional).
+It should try to revert the specified rev, and leave the reversion staged
+so `rcs_commit_staged` will complete it. It should return undef on _success_
+and an error message on failure.
-It should try to revert the specified rev, which includes committing
-the reversion, and returns undef on _success_ and an error message
-on failure.
+This hook and `rcs_preprevert` are optional, if not implemented, no revert
+web interface will be available.
### PageSpec plugins