* share plugins among zones in the same server block
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* update caddy dep
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* simp code
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* copy ListenHosts and Debug from first config
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* copy tls configs from first config
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* add test to validate debug setting is replicated to all configs in block
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

* stop server
Signed-off-by: Chris O'Haver <cohaver@infoblox.com>