server: better reverse proxy headers handling: reverse proxy header were not used if `X-Forwarded-Host` was not set, with this patch `X-Forwarded-Host` and `X-Forwarded-Proto` are check independently. Furthermore, the new standardised `Forwarded` header is not checked too. fix 396

#!/usr/bin/env python3


from libervia.server.constants import Const as C
from sat.core.log import getLogger

log = getLogger(__name__)


name = "merge-requests_new"
access = C.PAGES_ACCESS_PUBLIC
template = "merge-request/create.html"