[notmuch] [PATCHv2] Preserve folder information when indexing

[Sebastian Spaeth]

> /media/mail/mail
> ├── cur
> │   ├── 1265050537.H891745P1231.samir.ibcsolutions.de:2,S
> │   ├── 1265050572.H419259P1443.samir.ibcsolutions.de:2,S
> │   ├── 1265050598.H121639P1634.samir.ibcsolutions.de:2,S
> │   ├── 1265050617.H309805P1774.samir.ibcsolutions.de:2,S
> │   ├── 1265050625.H818906P1838.samir.ibcsolutions.de:2,S
> │   ├── 1265050955.H593083P2020.samir.ibcsolutions.de:2,S

A related question, currently notmuch seems to store the full absolute
path to mails, but I remeber seeing some documentation saying that it's
either absolute or relative to the xapian db dir. Is that correct, or is
it reasonable to assume absolute directories (as e.g. notmuchsync
currently does).

Sebastian