Fixes, fail testing:

Core:

* Test buffer_cat iterator move members

HTTP:

* Fixed yield / resume in writer
* Fixed message serialization with chunked encoding

* Test yield / resume in writer
* Test all conditional branches during message serialization
* Test chunked encoding
* Increase coverage on parse_error
* Add parse_error::general

WebSocket:

* Add error::general
* Increase coverage in error

test/http/basic_headers.cpp

@@ -58,5 +58,5 @@ public:
 
 BEAST_DEFINE_TESTSUITE(basic_headers,http,beast);
 
-} // asio
+} // http
 } // beast