Re: Cleaning up array_in()

hi.
attached v4.
v4, 0001 to 0005 is the same as v3 in
https://www.postgresql.org/message-id/5859ce4e-2be4-92b0-c85c-e1e24eab57c6%40iki.fi

v4-0006 doing some modifications to address the corner case mentioned
in the previous thread (like select '{{1,},{1},}'::text[]).
also fixed all these FIXME, Heikki mentioned in the code.

v4-0007 refactor ReadDimensionInt. to make the array dimension bound
variables within the INT_MIN and INT_MAX. so it will make select
'[21474836488:21474836489]={1,2}'::int[]; fail.