Remove `optional` from forwarding header
Remove `optional` from forwarding header

actor-framework/actor-framework,cmaughan/actor-framework,actor-framework/actor-framework,DavadDi/actor-framework,nq-ebaratte/actor-framework,1blankz7/actor-framework,nq-ebaratte/actor-framework,1blankz7/actor-framework,DavadDi/actor-framework,cmaughan/actor-framework,DavadDi/actor-framework,nq-ebaratte/actor-framework,nq-ebaratte/actor-framework,actor-framework/actor-framework,DavadDi/actor-framework,1blankz7/actor-framework,1blankz7/actor-framework,cmaughan/actor-framework,actor-framework/actor-framework