Merge branch 'add-more-feature-flags-for-desktop' into 'master'

Add feature flags for private groups, forums and blogs

See merge request briar/briar!1572

briar-headless/src/main/java/org/briarproject/briar/headless/HeadlessModule.kt

@@ -107,5 +107,8 @@ internal class HeadlessModule(private val appDir: File) {
         override fun shouldEnableImageAttachments() = false
         override fun shouldEnableProfilePictures() = false
         override fun shouldEnableDisappearingMessages() = false
+        override fun shouldEnablePrivateGroupsInCore() = false
+        override fun shouldEnableForumsInCore() = true
+        override fun shouldEnableBlogsInCore() = true
     }
 }