Fix yet another typo in comment.

Etsuro Fujita
Don't pass NULL to fprintf, if a bogus connection string is given to pg_dump.

Back-patch to all supported branches.
Fix pg_dumpall with database names containing =

If a database name contained a '=' character, pg_dumpall failed. The problem
was in the way pg_dumpall passes the database name to pg_dump on the
command line. If it contained a '=' character, pg_dump would interpret it
as a libpq connection string instead of a plain database name.

To fix, pass the database name to pg_dump as a connection string,
"dbname=foo", with the database name escaped if necessary.

Back-patch to all supported branches.
Merge branch 'master' of /home/kgrittn/pg/postgresql into matview
Redo the TRUNCATE change such that MATERIALIZED need not be parially reserved.

Per advice from Tom Lane