pgsql: Fix docs typo - Mailing list pgsql-committers

Fix docs typo

I don't think "respectfully" is what was meant here ...

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/c65aa7a87e4232d7eefea3d78ec7e1d9f8b4708b

Modified Files
--------------
doc/src/sgml/client-auth.sgml |    4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)