9.4.1210 release

Hi,

It's time to have yet another pgjdbc release.

Here are draft release notes for 9.4.1210:
https://github.com/pgjdbc/www/pull/27 (a bit easier to read is
https://github.com/vlsi/www/blob/dd427e620eb7b15eabbddd29fe7026d67181d512/documentation/changelog.md#version_9.4.1210
)

Does anybody have outstanding issues with releasing 1210?

As far as I know there's replication PR in progress:
https://github.com/pgjdbc/pgjdbc/pull/550
It might be a good idea to have replication API in.

Notable changes are:
* Better support for RETURN_GENERATED_KEYS, statements with RETURNING clause
* Avoid user-visible prepared-statement errors if client uses
DEALLOCATE/DISCARD statements (invalidate cache when those statements
detected)
* Avoid user-visible prepared-statement errors if client changes
search_path (invalidate cache when set search_path detected)
* Support comments when replacing {fn ...} JDBC syntax

Vladimir