pg_restore add --no-globals option when restored using pg_dumpall non-text dump

Hi,
Recently we committed a patch to dump a full cluster with pg_dumpall in
non-text archive format and then restore using pg_restore.
Here, I am proposing a patch to add the "pg_restore --no-globals" option so
that users can skip global objects.

I made a patch for pg_restore --no-globals (only pg_restore option, not
needed with pg_dumpall as we will filter at restore end, or later we can
add for pg_dumpall also.)

*Brief*:
pg_restore: add --no-globals option to skip globals

Do not restore global objects (roles and tablespaces) and even don't
create new database if
--create or -C is not specified.
Note: database will be created only if -C is specified, otherwise
restore will be skipped for a particular database. If a db is already
created, then data of a particular db will be restored.

Please review this patch and let me know your feedback.

--
Thanks and Regards
Mahendra Singh Thalor
EnterpriseDB: http://www.enterprisedb.com