pgsql: Classify DROP operations by whether or not they are user-initiat

Classify DROP operations by whether or not they are user-initiated.

This doesn't do anything useful just yet, but is intended as supporting
infrastructure for allowing sepgsql to sensibly check DROP permissions.

KaiGai Kohei and Robert Haas

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/0e549697d1c6b8eeb623c497dc38a5aed4deea1e

Modified Files
--------------
src/backend/catalog/aclchk.c | 2 +-
src/backend/catalog/dependency.c | 29 +++++++++++++++++++++------
src/backend/catalog/heap.c | 5 ++-
src/backend/catalog/pg_shdepend.c | 2 +-
src/backend/commands/cluster.c | 2 +-
src/backend/commands/dropcmds.c | 2 +-
src/backend/commands/foreigncmds.c | 2 +-
src/backend/commands/opclasscmds.c | 4 +-
src/backend/commands/tablecmds.c | 29 ++++++++++++++++++++-------
src/backend/commands/typecmds.c | 2 +-
src/backend/postmaster/autovacuum.c | 2 +-
src/backend/storage/large_object/inv_api.c | 2 +-
src/include/catalog/dependency.h | 6 +++-
src/include/catalog/heap.h | 2 +-
14 files changed, 61 insertions(+), 30 deletions(-)