pgsql: Extend pg_get_acl() to handle sub-object IDs

Extend pg_get_acl() to handle sub-object IDs

This patch modifies the pg_get_acl() function to accept a third argument
called "objsubid", bringing it on par with similar functions in this
area like pg_describe_object().  This enables the retrieval of ACLs for
relation attributes when scanning dependencies.

Bump catalog version.

Author: Joel Jacobson
Discussion: https://postgr.es/m/f2539bff-64be-47f0-9f0b-df85d3cc0432@app.fastmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/d898665bf7591514158954038ac43cea3240beaa

Modified Files
--------------
doc/src/sgml/func.sgml                   |  6 ++---
src/backend/catalog/objectaddress.c      | 43 ++++++++++++++++++++++++--------
src/include/catalog/catversion.h         |  2 +-
src/include/catalog/pg_proc.dat          |  2 +-
src/test/regress/expected/privileges.out | 32 +++++++++++++++++++++---
src/test/regress/sql/privileges.sql      | 12 ++++++---
6 files changed, 73 insertions(+), 24 deletions(-)