More easily recognize application/json input in request data for POST
More easily recognize application/json input in request data for POST

Browsers may include more data.  Tolerate by doing a substring search as is the case for form data.

whowutwut/confluent,jjohnson42/confluent,chenglch/confluent,jufm/confluent,jufm/confluent,xcat2/confluent,michaelfardu/thinkconfluent,chenglch/confluent,xcat2/confluent,jjohnson42/confluent,michaelfardu/thinkconfluent,chenglch/confluent,chenglch/confluent,whowutwut/confluent,xcat2/confluent,jjohnson42/confluent,michaelfardu/thinkconfluent,jufm/confluent,jjohnson42/confluent,michaelfardu/thinkconfluent,michaelfardu/thinkconfluent,xcat2/confluent,whowutwut/confluent,chenglch/confluent,jufm/confluent,jjohnson42/confluent,whowutwut/confluent,jufm/confluent,xcat2/confluent