Fix TO ORT for missing Content-Length, per RFC
Fix TO ORT for missing Content-Length, per RFC

Content-Length MAY be omitted per HTTP/1.1 RFC 7230, and in fact MUST
NOT be included with a 'Transfer-Encoding: Chunked' header, which MUST
be accepted by clients.

Fixes TC-503

jeffmart/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,alficles/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,alficles/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,mdb/incubator-trafficcontrol,alficles/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,mdb/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,alficles/incubator-trafficcontrol,mdb/incubator-trafficcontrol,mdb/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,mdb/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,alficles/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,mdb/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,mdb/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,alficles/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,mdb/incubator-trafficcontrol,mdb/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,alficles/incubator-trafficcontrol,alficles/incubator-trafficcontrol,jeffmart/incubator-trafficcontrol,alficles/incubator-trafficcontrol,mdb/incubator-trafficcontrol,serDrem/incubator-trafficcontrol,hbeatty/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,rscrimojr/incubator-trafficcontrol,alficles/incubator-trafficcontrol