* src/server/testsuite: Ignore core and vgcore.*.

Replaced the "Client host" and "Client port" configuration file
parameters with "Listen", and allow lyskomd to listen to more than
one port.
* doc/lyskomd.texi (Parameters): Replaced "Client host" and
"Client port" with "Listen".
* src/server/ramkomd.c (start_listen_sockets): New static
function.  Listen to all the ports specified by the "Listen:"
parameter.
(server_init): Use start_listen_sockets() instead of calling
isc_listentcp().  Removed the host and client_port arguments.  All
callers updated.
* src/server/testsuite/lyskomd.0/54.exp: New test suite.
* src/server/conf-file.c (ctor_ipport_list): New static function.
(dtor_ipport_list): New static function.
(assign_ipport_list): New static function.
(cf_ipport_list): New constant.
* src/server/conf-file.h (struct ipport_entry): New struct.
(struct ipport_list): New struct.
(cf_ipport_list): New constant.
* src/server/param.h (struct kom_par): Replaced "ip_client_host"
and "ip_client_port" with "listen".
* src/server/server-config.c (parameters): Ditto.
* src/server/prot-a-parse-arg-c.awk: Include "conf-file.h" from
the generated files.
* src/server/admin.c: Include "conf-file.h".
* src/server/aux-items.c: Ditto.
* src/server/checkkomspace.c: Ditto.
* src/server/conference.c: Ditto.
* src/server/connections.c: Ditto.
* src/server/dbck-cache.c: Ditto.
* src/server/dbck.c: Ditto.
* src/server/disk-end-of-atomic.c: Ditto.
* src/server/komrunning.c: Ditto.
* src/server/lockdb.c: Ditto.
* src/server/membership.c: Ditto.
* src/server/person.c: Ditto.
* src/server/prot-a-output.c: Ditto.
* src/server/prot-a-parse.c: Ditto.
* src/server/prot-a.c: Ditto.
* src/server/regex-match.c: Ditto.
* src/server/rfc931.c: Ditto.
* src/server/send-async.c: Ditto.
* src/server/session.c: Ditto.
* src/server/simple-cache.c: Ditto.
* src/server/splitkomdb.c: Ditto.
* src/server/text-garb.c: Ditto.
* src/server/text.c: Ditto.
* src/server/updateLysKOM.c: Ditto.
* run-support/config: Removed the "Client port" setting.

Adjust the test suite for the above change.
* src/server/testsuite/lyskomd.0/bug-64.exp: Expect memory leaks
due to bug 1599.
* src/server/testsuite/lyskomd.0/53.exp: Expect a more informative
error message when isc_listentcp fails.
* src/server/testsuite/lyskomd.0/11.exp: Expect an IP address in
the "Listening for clients" log message.
* src/server/testsuite/config/unix.exp (clientport_2): New
constant.
(clientport_3): New constant.
(lyskomd_start): New argument: listen_messages.  Use "Listen:"
instead of "Client port:".
(lyskomd_fail_start): Use "Listen:" instead of "Client port:".
(client_start): New optional argument: port.