FindRTI: Update documentation

- Formatting and descriptions synced similar to other find modules.
- The `$Id$` attribute removed as other modules don't provide this.
  These were mostly used with SVN.  In Git, the `ident` attribute
  should be specified in `.gitattributes` to have it automatically
  replaced with hexadecimal blob object name.
- Mailing list email moved to internal comments.
- Links in internal comments updated.