Skip DHCP detectors that couldn't be started

Author: jedisct1

dnscrypt-proxy/plugin_forward.go

@@ -130,6 +130,7 @@ func (plugin *PluginForward) Init(proxy *Proxy) error {
 				d6 := &dhcpdns.Detector{RemoteIPPort: "[2001:DB8::53]:80"}
 				if err := d6.Detect(); err != nil {
 					dlog.Criticalf("Failed to start the DHCP/DNS IPv6 server: %s", err)
+					continue
 				}
 				go d6.Serve(9, 10)
 				plugin.dhcpdns = append(plugin.dhcpdns, d6)
@@ -139,6 +140,7 @@ func (plugin *PluginForward) Init(proxy *Proxy) error {
 				d4 := &dhcpdns.Detector{RemoteIPPort: "192.0.2.53:80"}
 				if err := d4.Detect(); err != nil {
 					dlog.Criticalf("Failed to start the DHCP/DNS IPv4 server: %s", err)
+					continue
 				}
 				go d4.Serve(9, 10)
 				plugin.dhcpdns = append(plugin.dhcpdns, d4)