Simplify pg_upgrade C comment about what is preserved.
Branch------master
Details-------http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=3095643d374ca79e5aa347cefbaebdcf70169386
Modified Files--------------contrib/pg_upgrade/pg_upgrade.c | 18 ++++++------------1 files changed, 6 insertions(+), 12 deletions(-)
