For create/dropdb, only connect once to the server since we now have a
shared description table for pg_database comments.

Also update comments about database name selection.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/7ff7711919287a93f348023d77f9611633c9627c

Modified Files
--------------
src/bin/scripts/createdb.c |   11 +++++++----
src/bin/scripts/dropdb.c   |    5 +++++
2 files changed, 12 insertions(+), 4 deletions(-)

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