* Mac M1 Support
* Augmented root DSS and schema discovery based on content of schema directory
* LDAP workaround where req. attribute gets injected in response now works with combined filters
* SubSchema query can return a minimal set, freeipa or openldap's schemas
This commit actually covers a few items. In future commits, I will keep features distinct. This is only happening this time around due to how long it took to merge this branch.
Covered:
- Database plugins (at this time: SQLite, MySQL, Postgres)
- Backends acting as middleware: added the [[Backends]] configuration directive while retaining backward compatibility with [Backend]
- Schema introspection (root DSE query with base scope)
- When proxying, insert queried attribute back in upstream response, if absent, so that the LDAP library does not filter out all entries
- When chaining backends, any backend can be used to inject OTP value in password, before reaching a non-OTP-aware backend (currently guarded by a True statement in case we find an issue (I did thoroughly test but you never know))
- Handling of special "1.1" attributes filter meaning "I do not want attributes" (RFC 4511, 4.5.1.8)
- Support for "want types only" queries, even when proxying