documentation
[http] HttpCore: fixes setting max_request_body_size in config file
[http] HttpCore: fixes setting max_request_header_{count,size} in config file
[http] HttpStatus: adding missing strings for HTTP status codes.
[http] HttpCore: more copy'n'paste fixes
[http] HttpConnection: minor code cleanup
[base] Queue: adding helper methods `empty()` and `front()`.
[plugins] status: fixes shutdown-crash.