Add svg; use correct key for production mode
No content length
Attempts to work around issue where body is sent before headers under heavy load - at this point I do not think it's an acteur bug;  don't send age headers;  more hacks in HackHttpHeaders to keep the http codec from hijacking the transfer encoding;  disable compression for responses with X-Internal-Gzip set;  optionally Event.getRemoteAddress() can decode X-Forwarded-For and/or X-Real-IP if present to transparently give real addresses behind reverse proxies.