Made connection an abstract base class from which individual drivers
deriver their specific connection classes (like it was intended in the
first place). Added generic functions to get the address and hostname
of the client.
nearly all concepts and simple implementations thereof needed to get a
simple HTTP/0.9 "compliant" server working (there are some hacks
needed that we don't yet provide, since the correct things will be
added shortly, like complete HTTP/1.1 request parsing. The hacks
needed are provided as part of the basic HTTP/0.9 server demo in
src/test/basic-demo.cl).
Further work is needed to clean up some things, Entity and Resource
handling needs to be implemented right and less "naive" (the current
implementations are just simple place-holders to get things up and
running). Connections need to have knowledge of client identity
(passed from the driver, this is implementation-specific stuff).
Logging needs to be implemented (probably as server mixins).
Condition handling needs to generate better responses for HTTP/0.9,
and the division between condition handling and normal handling needs
to be documented/rethought. Content generation is totally missing
currently and needs to be implemented. If this is all in place, an
HTTP/1.0 conforming server should be possible, and after porting the
drivers to ACL and LW, we can make a first release.
