Bunch of interesting loosenings ups on logical replication. Allowing standbys to also have subscribers; great for fan out! Bunch of perf improvements (honestly

Bunch of interesting loosenings ups on logical replication. Allowing standbys to also have subscribers; great for fan out! Bunch of perf improvements (honestly a bunch of it is removing rather onerous limitations I didn't know about!) At the end there seems to be a developer flag for allowing seeming bidirectional replication too.