Fix unnecessary path rebuilding

SessionSnodeKit/OnionRequestAPI.swift

@@ -438,10 +438,12 @@ public enum OnionRequestAPI {
                         OnionRequestAPI.snodeFailureCount[snode] = snodeFailureCount
                     }
                 } else {
-                    handleUnspecificError()
+                    // Do nothing
                 }
             } else if let message = json?["result"] as? String, message == "Loki Server error" {
                 // Do nothing
+            } else if statusCode == 0 { // Timeout
+                // Do nothing
             } else {
                 handleUnspecificError()
             }

SessionSnodeKit/SnodeAPI.swift

@@ -339,7 +339,7 @@ public final class SnodeAPI : NSObject {
             }
         }
         switch statusCode {
-        case 0, 400, 500, 503:
+        case 500, 502, 503:
             // The snode is unreachable
             handleBadSnode()
         case 406: