[PATCH] COPY command's data format option allows only lowercase csv,text or binary

Hi,

COPY command's FORMAT option allows only all lowercase csv, text or
binary, this is true because strcmp is being used while parsing these
values.

It would be nice if the uppercase or combination of lower and upper
case format options such as CSV, TEXT, BINARY, Csv, Text, Binary so
on. is also allowed.

To achieve this pg_strcasecmp() is used instead of strcmp.

Attached is a patch having above changes.

Request the community to review the patch, if it makes sense.

With Regards,
Bharath Rupireddy.
EnterpriseDB: http://www.enterprisedb.com