doc: document that INFO messages always go to client.
In passing add a couple of links to the message severity table.
Backpatch because it's always been this way.
Author: Karl O. Pinc <kop@meme.com>
Branch
------
REL9_5_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/3c4bdacc22fc9909768c4f45a739ca2e2249be99
Modified Files
--------------
doc/src/sgml/config.sgml | 32 ++++++++++++++++++++------------
1 file changed, 20 insertions(+), 12 deletions(-)