Irrd

where startup could fail when using the user/group settings. This happened because of
an incorrect log file access check.

* Password hashers configured as legacy were incorrectly not
available for authentication.
* The password validation did not gracefully handle maintainers
that had no currently supported authentication methods.

* Set members included through mbrs-by-ref / member-of did not have the correct source filter applied. This meant that members could be included in a set, even through the aut-num, route or route6 object were from a different IRR source.
* IRRD could incorrectly try to use synchronised serials even when route object preference was enabled. This could cause issues for mirrored sources when this setting was enabled, but RPKI and the scope filter were not. If this affected your setup, mirroring would break, but IRRD would log errors repeatedly.
* The PyYAML dependency was updated to 6.0.1 to resolve installation issues in certain environments.

Release candidate 1 for 4.3.0. Will be released as 4.3.0 unless any issues are reported.