foldermap: make folder-map syntax more expressive

Improve the folder mapping syntax so that prefixes can be removed
completely. The following line in the folder-map file

* = INBOX/*

will strip the INBOX/ prefix from all subfolders of INBOX, e.g. map
"INBOX/Project1" to "Project1".

To prevent a key collision with multiple "*" keys (the folder mapping is
stored as a map internally), a group of "*" will be condensed to one "*",
e.g.

** = INBOX/*

has the same meaning as above.

Also, adjust name translation for folder creation and add tests.

Fixes: https://todo.sr.ht/~rjarry/aerc/176
Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>
Tested-by: Bence Ferdinandy <bence@ferdinandy.com>

0 files changed, 0 insertions, 0 deletions