Update copyright.

Update copyright.
(clone-process): Use make-network-process to clone network
processes. Get command list via (process-contact ... t).
Use set-process-query-on-exit-flag and process-query-on-exit-flag
instead of process-kill-without-query.
(open-network-stream): Replaces C-version from process.c.
(open-network-stream-nowait, open-network-stream-server): New
functions.
(process-kill-without-query): Replaces C-version from process.c.