Incomplete TODO items

All the things I've found out on the way, that need retouching

consider replacing Result with T and throw instead.
http: rework HttpClient API (so it's becoming dead-easy to be used within proxy code)
http.client: HttpClient to support fastcgi
http.cluster: HealthMonitor to support fastcgi

Intermediate 0

unit tests: adapt to API changes
- raft::InetTransport (<- LocalTransport)
- http1::Connection (<- LocalTransport)
- HttpClient (<- local HttpServer)
??? rewrite some throw's to Result<>|std::error_code returns
eliminate DataChainListener and/or greatly simplify DataChain
eliminate need of EndPointWriter via DataChain
??? eliminate TcpUtil
HttpListener: onMessageContent(HugeBuffer&&) instead
extend FCGI connector to tweak maxKeepAlive (just like in HTTP/1)
- make sure the keepalive-timeout is fired correctly
  - test cancellation (due to io) and fire (due to timeout).
http2: use wireshark to get binary expected data for the Parser & Generator tests
easy enablement of FCGI in all http examples.

SSL: SslConnector: add optional support to also allow plaintext connections
SSL: ability to setup a certificate password challenge callback
SSL: support different session cache stores (memory, memcached, ...)
SSL: support enabling/disabling SSL renegotiation - http://www.thc.org/thc-ssl-dos/
SSL: ensure we can reconfigure cipher priorities to counter BEAST attack - http://www.g-loaded.eu/2011/09/27/mod_gnutls-rc4-cipher-beast/
http: ensure TCP_CORK / TCP_NOPUSH is set/cleared implicitely in plaintext vs interactive http responses

test: test each public API is well tested
raise 504 (gateway timeout) if backend page load takes too long and no result has been sent to the client yet (close connection directly otherwise).

stdout/stderr to point to log stream/handler directly,
add x0d --dump-du (dump flow's def-use chain)
resource management (at least for max_core_size) must be evaluated after privilege dropping, in case there is some, or they're lost.

core: Process (QA: prefer posix_spawn() over vfork() to exec child processes)
net: improved EndPoint timeout handling (distinguish between read/write/keepalive timeouts)
HttpTransport::onInterestFailure() => (factory || connector)->report(this, error);
http: chunked request trailer support & unit test
doc: doxygen: how to document a group of functions all at once (or, how to copydoc)
test: call completed() before contentLength is satisfied in non-chunked mode (shall be transport generic)
test: attempt to write more data than contentLength in non-chunked mode (shall be transport generic)
logging: improve (debug) logging facility