Implemented remote sockets, not in configuration yet.

Knot.files

src/Makefile.am

src/common/evqueue.c

src/common/fdset.c

src/common/fdset.h

src/knot/conf/conf.c

src/knot/conf/conf.h

src/knot/main.c

src/knot/server/socket.c

src/knot/server/socket.h

src/knot/server/tcp-handler.c

src/knot/server/tcp-handler.h