Improves handling of forwarded headers. Fix #2094
Disable Akka HTTP server tests while broken; reverse previous change
Merge pull request #3612 from richdougherty/akka-http-skip-tests

Disable Akka HTTP server tests while broken; reverse previous change
Merge pull request #3490 from martinpallmann/issue-2094

Improves handling of forwarded headers. Fix #2094