New pg_dump committed...

I've now committed the latest pg_dump. The following is the list of changes:

- Support for relkind = RELKIND_VIEW.
- Use symbols for tests on relkind (ie. use RELKIND_VIEW, not 'v')
- Fix bug in support for -b option (== --blobs).
- Dump views as views (using 'create view').
- Remove 'isViewRule' since we check the relkind when getting tables.
- Now uses temp table 'pgdump_oid' rather than 'pg_dump_oid' (errors
otherwise).
- Added extra param for specifying handling of OID=0 and which typename to
output.
- Fixed bug in SQL scanner when SQL contained braces. (in rules)
- Use format_type function wherever possible

It works on all my DBs, and on the regression DB, so I am at least mildly
optimistic. The main issue that I think might arise are from the use of
format_type in function definitions. It's easy to change if we have to go
back to using typname.


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