Fixed unreliable browse resolve, per PR: mono/Mono.Zeroconf#11

Arkane.Zeroconf/Providers/Bonjour/BrowseService.cs

@@ -35,14 +35,22 @@ public BrowseService (string name, string replyDomain, string regtype) : base (n
 
         public event ServiceResolvedEventHandler Resolved ;
 
-        public void Resolve () { this.Resolve (false) ; }
+        public void Resolve ()
+        {
+            // If people call this in a ServiceAdded event handler (which they generally do), we need to
+            // invoke onto another thread, otherwise we block processing any more results.
+            this.resolveAction.BeginInvoke (false, null, null) ;
+        }
 
         private void SetupCallbacks ()
         {
             this.resolve_reply_handler = this.OnResolveReply ;
             this.query_record_reply_handler = this.OnQueryRecordReply ;
+            this.resolveAction = this.Resolve;
         }
 
+        private Action <bool> resolveAction ;
+
         public void Resolve (bool requery)
         {
             if (this.resolve_pending)