honour TEMP_CONFIG in pg_upgrade tests

I propose to have the pg_upgrade test honour TEMP_CONFIG as pg_regress
(or its Makefile) does, by applying the patch below. There might be
opther places this should also be done, but this would be a start. The
motivation is to see if it stops the errors we often see on the somewhat
slow axolotl buildfarm member when checking pg_upgrade - axolotl's
TEMP_CONFIG sets up the stats temp directory on a ramdisk, as well as
turning off fsync.

This would be backpatched to 9.2.

cheers

andrew

diff --git a/src/bin/pg_upgrade/test.sh b/src/bin/pg_upgrade/test.sh
index ec3a7ed..c0dcf8b 100644
--- a/src/bin/pg_upgrade/test.sh
+++ b/src/bin/pg_upgrade/test.sh
@@ -21,6 +21,10 @@ unset MAKELEVEL
# authentication configuration.
standard_initdb() {
"$1" -N
+ if [ -n "$TEMP_CONFIG" -a -f "$TEMP_CONFIG" ]
+ then
+ cat "$TEMP_CONFIG" >> "$PGDATA/postgresql.conf"
+ fi
../../test/regress/pg_regress --config-auth "$PGDATA"
}