Whitelist headers we take from Parsoid variant transform
Whitelist headers we take from Parsoid variant transform

Change-Id: I72826a87ae756d7ff3dfdec59d5972bf974d065a

wikimedia/mediawiki-services-restbase,milimetric/restbase,wikimedia/restbase,d00rman/restbase,cscott/restbase,wikimedia/restbase,Pchelolo/restbase,milimetric/restbase,d00rman/restbase,Pchelolo/restbase,wikimedia/mediawiki-services-restbase,cscott/restbase