swarm: Fixed http_headers::add overload
thevoid: Added info-level access log
v0.6.3.4
thevoid: Added local and remote addr to access log
v0.6.3.5
thevoid: Convert endpoint to strings at the start

This saves us from situation when socket is already closed and we
want to write about it to access log
v0.6.3.6
swarm: boost: Cancel socket on pool_remove
thevoid: Removed unused m_io_service from monitor_connection
thevoid: Fixed infinity loop

There was infinity loop in case if user writes empty buffer
to the client's socket
swarm: Added punycode support to URLs

Added normal percent encoding/decoding for path and fragment parts
Added new dependency - libidn
swarm: Updated url test
v0.6.3.7
thevoid: Added additional error messages

Write error log message in case of invalid urls and if handler for
url is not found
v0.6.3.8
example: Fixed download with boost::asio
swarm: Don't check OS_ERRNO if request successed
v0.6.3.9
thevoid: Added more server::options

Added path's regular expression match.
Added query match.
Added hostname match.
v0.6.4.0