Secure thrift should not leak its headers to the clients
Secure thrift should not leak its headers to the clients

Summary:
This bug was discovered when adding propagation of response headers back
from sr proxy to www client. www was seeing an unexpected value in the
header and closing the connection.

Test Plan:
ran the proxy locally on the box:
~/fbcode/_build/opt/servicerouter/standalone/server/servicerouter -v 1 2>&1 | grep face

added it to servicerouter tier:
[mshneer@dev225 ~/fbcode/servicerouter/client/cpp2] smcc ls servicerouter.oregon.prn1.prn1c16
dev225.prn1.facebook.com:7789
[mshneer@dev225 ~/fbcode/servicerouter/client/cpp2] smcc enable-all servicerouter.oregon.prn1.prn1c16

Verified no errors indicating www->srproxy channel is unexpectedly closed:
V0903 14:28:59.283021  8541 Cpp2Connection.cpp:119] Task killed due to channel close: [2401:db00:11:10cf:face:0:37:0]:40130

Reviewed By: alandau@fb.com

Subscribers: alandau, bmatheny

FB internal diff: D1534631

Tasks: 5044005

guker/fbthrift,uber/fbthrift,chjp2046/fbthrift,maxwell-demon/fbthrift,getyourguide/fbthrift,Orvid/fbthrift,raphaelamorim/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,facebook/fbthrift,HankFaan/fbthrift,project-zerus/fbthrift,HankFaan/fbthrift,LinusU/fbthrift,LinusU/fbthrift,facebook/fbthrift,maxwell-demon/fbthrift,project-zerus/fbthrift,fengshao0907/fbthrift,Orvid/fbthrift,LinusU/fbthrift,maxwell-demon/fbthrift,facebook/fbthrift,getyourguide/fbthrift,HankFaan/fbthrift,getyourguide/fbthrift,SergeyMakarenko/fbthrift,Orvid/fbthrift,Orvid/fbthrift,sinjar666/fbthrift,guker/fbthrift,kangkot/fbthrift,maxwell-demon/fbthrift,fengshao0907/fbthrift,fengshao0907/fbthrift,maxwell-demon/fbthrift,project-zerus/fbthrift,guker/fbthrift,sinjar666/fbthrift,SergeyMakarenko/fbthrift,soumith/fbthrift,fengshao0907/fbthrift,facebook/fbthrift,Orvid/fbthrift,facebook/fbthrift,maxwell-demon/fbthrift,jesboat/fbthrift,jesboat/fbthrift,SergeyMakarenko/fbthrift,guker/fbthrift,guker/fbthrift,getyourguide/fbthrift,project-zerus/fbthrift,LinusU/fbthrift,kangkot/fbthrift,maxwell-demon/fbthrift,jesboat/fbthrift,sinjar666/fbthrift,raphaelamorim/fbthrift,Orvid/fbthrift,kangkot/fbthrift,raphaelamorim/fbthrift,jesboat/fbthrift,getyourguide/fbthrift,uber/fbthrift,kangkot/fbthrift,Orvid/fbthrift,soumith/fbthrift,SergeyMakarenko/fbthrift,uber/fbthrift,chjp2046/fbthrift,jesboat/fbthrift,chjp2046/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,SergeyMakarenko/fbthrift,guker/fbthrift,chjp2046/fbthrift,raphaelamorim/fbthrift,getyourguide/fbthrift,project-zerus/fbthrift,chjp2046/fbthrift,facebook/fbthrift,project-zerus/fbthrift,HankFaan/fbthrift,uber/fbthrift,chjp2046/fbthrift,sinjar666/fbthrift,jesboat/fbthrift,uber/fbthrift,kangkot/fbthrift,LinusU/fbthrift,uber/fbthrift,getyourguide/fbthrift,guker/fbthrift,facebook/fbthrift,raphaelamorim/fbthrift,facebook/fbthrift,SergeyMakarenko/fbthrift,soumith/fbthrift,Orvid/fbthrift,HankFaan/fbthrift,HankFaan/fbthrift,sinjar666/fbthrift,jesboat/fbthrift,fengshao0907/fbthrift,raphaelamorim/fbthrift,uber/fbthrift,getyourguide/fbthrift,SergeyMakarenko/fbthrift,guker/fbthrift,SergeyMakarenko/fbthrift,LinusU/fbthrift,chjp2046/fbthrift,uber/fbthrift,project-zerus/fbthrift,kangkot/fbthrift,soumith/fbthrift,SergeyMakarenko/fbthrift,raphaelamorim/fbthrift,chjp2046/fbthrift,jesboat/fbthrift,soumith/fbthrift,kangkot/fbthrift,HankFaan/fbthrift,maxwell-demon/fbthrift,uber/fbthrift,kangkot/fbthrift,LinusU/fbthrift,fengshao0907/fbthrift,kangkot/fbthrift,HankFaan/fbthrift,sinjar666/fbthrift,project-zerus/fbthrift,soumith/fbthrift,jesboat/fbthrift,maxwell-demon/fbthrift,sinjar666/fbthrift,sinjar666/fbthrift,LinusU/fbthrift,LinusU/fbthrift,fengshao0907/fbthrift,soumith/fbthrift,uber/fbthrift,Orvid/fbthrift,sinjar666/fbthrift,chjp2046/fbthrift,LinusU/fbthrift,Orvid/fbthrift,raphaelamorim/fbthrift,project-zerus/fbthrift,project-zerus/fbthrift,guker/fbthrift,fengshao0907/fbthrift,HankFaan/fbthrift,LinusU/fbthrift,soumith/fbthrift,project-zerus/fbthrift,jesboat/fbthrift,chjp2046/fbthrift,kangkot/fbthrift,fengshao0907/fbthrift,soumith/fbthrift,project-zerus/fbthrift,getyourguide/fbthrift,Orvid/fbthrift,SergeyMakarenko/fbthrift,maxwell-demon/fbthrift,HankFaan/fbthrift,kangkot/fbthrift,jesboat/fbthrift,chjp2046/fbthrift,guker/fbthrift,raphaelamorim/fbthrift,soumith/fbthrift,getyourguide/fbthrift,uber/fbthrift,maxwell-demon/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,sinjar666/fbthrift,uber/fbthrift,fengshao0907/fbthrift,jesboat/fbthrift,HankFaan/fbthrift,soumith/fbthrift,facebook/fbthrift,SergeyMakarenko/fbthrift,sinjar666/fbthrift,chjp2046/fbthrift,guker/fbthrift