[pgpool-committers: 2410] pgpool: Back porting the patch for fixing the behavior of "client_min_m

[Muhammad Usama]

Back porting the patch for fixing the behavior of "client_min_messages"
configuration parameter.
This parameter controls the minimum message levels to be sent to the frontend.
The problem was, Regardless of the value of the parameter all the messages with
severity less than NOTICE level were not being forwarded to the client, reason
was an invalid check in elog.c send_message_to_frontend() function.
And secondly, the commit fixes a mistake in documentation regarding the valid
values for this parameter. Severity levels PANIC and FATAL are always sent to
the frontend and these two values are not valid configurations for the
"client_min_messages", so removing the PANIC and FATAL as valid values from the
documentation of client_min_messages.

Branch
------
V3_4_STABLE

Details
-------
http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=e456a3259928efd84d0e4bf74197df08d8b9ee23

Modified Files
--------------
doc/pgpool-en.html     |    4 +-
src/include/pool.h     |    4 ++
src/protocol/child.c   |  104 ++++++++++++++++++++++++++++++++----------------
src/utils/error/elog.c |   68 +++++++++++--------------------
4 files changed, 99 insertions(+), 81 deletions(-)