ignore folders patch?

[Fabio Zanini]

Hi!

This is my first message to the list. In 2010 a patch was developed that
enabled notmuch new to ignore certain subdirectories of the mail folder:

http://notmuchmail.org/pipermail/notmuch/2010/003170.html

However, I cannot find any reference to it in the git history, and it
does not seem to have been implemented.

This feature seems to be relevant, what would you think of reviving it
and including it into the codebase? I could try to update the patch
myself.

Cheers,
Fabio