Parse url according to rfc 1738: add separate define for TLD.
Fix DOMAIN and TLD per rfc 1738, thanks Arnavion
Prev called anything a URL!  Reverted but slight DOMAIN change.
Oops. didn't get the DOMAIN slight change last time.  Here it is now.
Merge pull request #377 from RichardHitt/issue376

Parse url according to rfc 1738: add separate define for TLD.  Closes 376.