postgis 3 packages conflict with postgis 2.5 packages via address_standardizer.so

[myon]

In PostGIS 2.5, the version number was dropped from address_standardizer-$version.so:

2.4: /usr/lib/postgresql/10/lib/address_standardizer-2.4.so
2.5 and 3: /usr/lib/postgresql/10/lib/address_standardizer.so

This causes the Debian packages for postgresql-10-postgis-2.5 and postgresql-10-postgis-3 to conflict. (Same for other PostgreSQL versions.)

We've spent years on making co-installation of PostGIS packages for different versions possible. Please consider re-adding the major version number in the .so filenames for version 3. (2.5 can stay that way if it's the only version that does it.)

[Algunenano]

This was changed in ​https://trac.osgeo.org/postgis/ticket/3885

@robe Anything against bringing it back for 3.0 (address_standardizer-3.so) to help with packaging?

[robe]

no I'm fine with putting 3 in there.

[Algunenano]

PR in ​https://github.com/postgis/postgis/pull/413. I've reverted the change and also applied the --with-library-minor-version change.

[Algunenano]

Applied in r17482.

I don't think it's worth back-porting it to 2.5 at this point since it's a breaking change and it might cause some headaches.