Replace genre with entire canonical branch using lastgrenre

[shooftie]

I use lastgenre but mainly for organising existing genre tags. I therefore have two questions/feature requests:

1. Prevent lastgrenre from even making a call to Last.fm for a genre at all i.e. only work on existing tags

It might be a little odd for a plugin who's raison d'etre is to seek out missing genres, but hey-ho. The reason is that I would like to speed up the process and also to prevent any unwanted Last.fm genres from nuking what I already have; genres are extremely subjective.

I appreciate that this is likely a feature request.

2. replace a genre with the entire canonical branch for said genre

A typical genre might look something like: Electronic; Techno; Acid Techno.

My canonical tree might look like:

- Electronic:
  - Techno:
    - Acid Techno 

Some tracks might only have Acid Techno as a genre, in which case I would like lastgenre to replace it with Electronic; Techno; Acid Techno.

Likewise, if a track only has Techno then I would like it to be replaced with Electronic; Techno;

This might already be possible, although I have everything I can think of without success.