Using sha1 hash instead of md5 for password hashing in FluxBB because FluxBB uses prior sha1 hash and md5 only in last sentence.
Escaping all characters in login names and be able to retreive them without slashes - FluxBB does not allow this so Piwigo's user names with escaped characters will not been escaped in FluxBB (ie : "it's" in Piwigo will be "It\'s" in FluxBB)