engineweb: update method to retrieve HTTP_HOST address
engineweb: update method to retrieve HTTP_HOST address

Former-commit-id: 7cf68b554fd698792aed824ca6d5bd55664b70df [formerly 7cf68b554fd698792aed824ca6d5bd55664b70df [formerly 66fc1a82c8e09051e4d085a5f6b4fdc4b50ba143]]
Former-commit-id: 6c353258665206ca3ca4039794067517fd9017dd
Former-commit-id: f33ece328a8e9089cd21b0cf022851480b52169b
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine