Undo thinko in commit e78d1d6d4.

Improve our support for Valgrind's leak tracking.

Suppress complaints about leaks in TS dictionary loading.

Suppress complaints about leaks in function cache loading.

Silence complaints about leaks in PlanCacheComputeResultDesc.

Improve hash join's handling of tuples with null join keys.

Silence leakage complaint about postgres_fdw's InitPgFdwOptions.

Run pgindent on the changes of the previous patch.

Reap the benefits of not having to avoid leaking PGresults.

Create infrastructure to reliably prevent leakage of PGresults.

Fix memory leakage in postgres_fdw's DirectModify code path.

Run pgindent on the previous commit.

Fix edge-case resource leaks in PL/Python error reporting.

Tighten parsing of datetime input.