Add support for custom collectors and bouncers

config/settings.go

@@ -119,8 +119,10 @@ type Sharing struct {
 
 // Advanced settings
 type Advanced struct {
-	UseDomainFronting bool `json:"use_domain_fronting"`
-	SendCrashReports  bool `json:"send_crash_reports"`
+	UseDomainFronting bool   `json:"use_domain_fronting"`
+	SendCrashReports  bool   `json:"send_crash_reports"`
+	CollectorURL      string `json:"collector_url"`
+	BouncerURL        string `json:"bouncer_url"`
 }
 
 // AutomatedTesting settings

config/testdata/valid-config.json

@@ -58,6 +58,8 @@
   },
   "advanced": {
     "use_domain_fronting": false,
-    "send_crash_reports": true
+    "send_crash_reports": true,
+    "bouncer_url": "https://bouncer.ooni.io/",
+    "collector_url": "https://c.collector.ooni.io/",
   }
 }