package/python-daphne: new package

package/python-daphne: new package

Daphne is a HTTP, HTTP2 and WebSocket protocol server for ASGI and ASGI-HTTP,
developed to power Django Channels.

It supports automatic negotiation of protocols; there's no need for URL
prefixing to determine WebSocket endpoints versus HTTP endpoints.

In addition, add the patch: remove pytest-runner-requirement.
Setup and runtime work without without pytest-runner as such, it is not actually
a requirement for building.

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
[Thomas:
 - alphabetic ordering of select in Config.in
 - make the license more precise, as suggested by Yegor]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>