the schema intended for JSON output.

Conflicts:
	bin/varnishd/cache/cache_backend.c
	bin/varnishd/cache/cache_backend_probe.c
	bin/varnishd/cache/cache_director.c
	bin/varnishtest/tests/d00005.vtc
	bin/varnishtest/tests/v00014.vtc

Only help -j is fixed, the backend changes are left out.