Bug#941078: transition: postgresql-12

[Christoph Berg <myon@debian.org>]

Here's the situation as of now, looking at https://qa.debian.org/excuses.php?package=postgresql-common

Issues preventing migration:

Fix waiting in NEW:

autopkgtest for pg-rage-terminator/0.1.7-2: amd64: Regression ♻
autopkgtest for postgresql-multicorn/1.3.4-18-g99ea772-2: amd64: Regression ♻

Fix just uploaded:

autopkgtest for check-postgres/2.24.0-3: amd64: Regression ♻
autopkgtest for pgsphere/1.1.1+2018.10.13-1: amd64: Regression ♻ (Fix in postgresql-common)

Need fixing upstream (and should be ignored and/or removed from
testing until that happens):

autopkgtest for cstore-fdw/1.6.2-1: amd64: Regression ♻
autopkgtest for hypopg/1.1.2-1: amd64: Regression ♻
autopkgtest for pgaudit/1.4.0-1: amd64: Regression ♻
autopkgtest for pglogical/2.2.2-1: amd64: Regression ♻
autopkgtest for pglogical-ticker/1.4.0-1: amd64: Regression ♻
autopkgtest for repmgr/5.0.0-2: amd64: Regression ♻
autopkgtest for wal2json/1.0-5: amd64: Regression ♻

To be investigated:

autopkgtest for postgresql-q3c/1.8.0-1: amd64: Regression ♻

These are OK and need to migrate in parallel with postgresql-common so
the list of supported PG versions is in sync:

autopkgtest for omnidb/2.16.0+ds-2: amd64: Regression ♻
autopkgtest for pg-checksums/1.0-1: amd64: Regression ♻
autopkgtest for pg-repack/1.4.5-2: amd64: Regression ♻
autopkgtest for pg-similarity/1.0-2: amd64: Regression ♻
autopkgtest for pgagent/4.0.0-5: amd64: Regression ♻
autopkgtest for pgpool2/4.0.6-1: amd64: Regression ♻
autopkgtest for pgrouting/2.6.3-1: amd64: Regression ♻
autopkgtest for postgis/3.0.0+dfsg-1: amd64: Regression ♻
autopkgtest for rdkit/201903.1-2: amd64: Regression ♻
autopkgtest for slony1-2/2.2.8-1: amd64: Regression ♻


So the ideal solution would be to have this last bunch tested+migrated
along with postgresql-common. (If that's not possible, one possible
solution could be to just force postgresql-common into testing, and have
that bunch follow on its own because the the tests should pass.)

Most of these also need amd64 "rebuild on buildd" binnmus. Do you want
me to compile a list, or do you have that at hand anyway?

Thanks,
Christoph