radicale rights file and case-sensitive issue

[vijaysar]

Looks like the rights file regex is compared case-sensitive by default. We have users whose URL is http://calurl/user/user.ics but the user is allows to login with credentials of User or usEr without any case checking. Is it possible to support this in rights file? Or in the code you could check regex match with

re.IGNORECASE

flag. The later seems like a good long term option.