Move any modified baselines for layout tests into a WTFURL-specific directory.
Revert "Simplify and correctly(?) implement the query encoding."

This reverts commit cf6ea07dde5fe4f1159a104a75fe38deb4bf8e3e.
The converter is still required.
Revert "Adjust http/tests/xmlhttprequest/encode-request-url-2.html to test for the proper expected result."

This reverts commit 8871706054be83f024d811ffb7e6e4c41007ef42.
Plain wrong.
Delete an unnecessary and incorrect baseline.
Remove another unnecessary and incorrect baseline.
Redo the query encoding, correctly operating on either 8-bit or 16-bit Unicode strings and again using the URLQueryCharsetConverter.