pgsql: pg_regress: Add application name setting

pg_regress: Add application name setting

Set the PGAPPNAME environment variable in pg_regress so that it
identifies itself as such instead of "psql".

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/95ca2859f45171c345d427991c1f319b5e77cc6c

Modified Files
--------------
src/test/regress/pg_regress.c |    2 ++
1 files changed, 2 insertions(+), 0 deletions(-)