Re: GRANT ON ALL IN schema

So, here is the first version of the patch.
It includes functionality itself, simple regression test and also very
simple documentation.

The patch allows "GRANT ON ALL TABLES/VIEWS/FUNCTIONS/SEQUENCES IN
schemaname, schemaname2 TO username" and same thing for REVOKE.
Words TABLES, VIEWS, FUNCTIONS and SEQUENCES were added as unreserved
keywords. Unfortunately I was unable to create syntax with optional
SCHEMA keyword after IN (shift/reduce conflicts), if it's needed maybe
somebody with better bison knowledge might add it.
Also since this patch introduces VIEWS as object with grantable
privileges, I added GRANT ON VIEW foo syntax which is more or less
synonymous to GRANT ON TABLE foo syntax. It felt weird to have GRANT ON
ALL VIEWS but not GRANT ON VIEW.

Any comments/suggestions are welcome (I especially wonder if the use of
list_union_ptr is acceptable).

--
Regards
Petr Jelinek (PJMODOS)