[pgpool-committers: 10167] pgpool: Add pcp_invalidate_query_cache manuals.

[Tatsuo Ishii]

Add pcp_invalidate_query_cache manuals.

Commit 09d4e59c5 forgot to push those manuals.

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=7008d9ffb781c46480d7502de722cb29acf65e8b

Modified Files
--------------
.../src/sgml/ref/pcp_invalidate_query_cache.sgml   | 93 ++++++++++++++++++++++
doc/src/sgml/ref/pcp_invalidate_query_cache.sgml   | 66 +++++++++++++++
2 files changed, 159 insertions(+)