Update pg_upgrade comment on missing 'postgres' database.
Branch------master
Details-------http://git.postgresql.org/pg/commitdiff/09d1174e5ad3ec7c90c99e2ad4dd896368b018ce
Modified Files--------------contrib/pg_upgrade/relfilenode.c | 3 ++-1 files changed, 2 insertions(+), 1 deletions(-)
