Make named a singleton process [RT#37908]

Conflicts:
	bin/tests/system/conf.sh.in
	lib/dns/win32/libdns.def.in
	lib/isc/win32/file.c

The merge also needed to update files in legacy and tcp system tests
(newly introduced in master after branch was created) to introduce use
of lockfile.

bin/tests/system/runtime/README

@@ -0,0 +1,5 @@
+Copyright (C) 2014  Internet Systems Consortium, Inc. ("ISC")
+See COPYRIGHT in the source root or http://isc.org/copyright.html for terms.
+
+Tests of runtime checks, e.g., that named prevents duplicate processes
+from running.