Add backwards-compatibility wrappers around LLAIP methods that now take NetworkFilters.

c++/src/kj/async-io.c++

@@ -213,6 +213,20 @@ Own<DatagramPort> LowLevelAsyncIoProvider::wrapDatagramSocketFd(
   KJ_UNIMPLEMENTED("Datagram sockets not implemented.");
 }
 
+namespace {
+
+class DummyNetworkFilter: public kj::LowLevelAsyncIoProvider::NetworkFilter {
+public:
+  bool shouldAllow(const struct sockaddr* addr, uint addrlen) override { return true; }
+};
+
+}  // namespace
+
+LowLevelAsyncIoProvider::NetworkFilter& LowLevelAsyncIoProvider::NetworkFilter::getAllAllowed() {
+  static DummyNetworkFilter result;
+  return result;
+}
+
 // =======================================================================================
 
 namespace _ {  // private

c++/src/kj/async-io.h

@@ -536,16 +536,24 @@ public:
     virtual bool shouldAllow(const struct sockaddr* addr, uint addrlen) = 0;
     // Returns true if incoming connections or datagrams from the given peer should be accepted.
     // If false, they will be dropped. This is used to implement kj::Network::restrictPeers().
+
+    static NetworkFilter& getAllAllowed();
   };
 
   virtual Own<ConnectionReceiver> wrapListenSocketFd(
       Fd fd, NetworkFilter& filter, uint flags = 0) = 0;
+  inline Own<ConnectionReceiver> wrapListenSocketFd(Fd fd, uint flags = 0) {
+    return wrapListenSocketFd(fd, NetworkFilter::getAllAllowed(), flags);
+  }
   // Create an AsyncIoStream wrapping a listen socket file descriptor.  This socket should already
   // have had `bind()` and `listen()` called on it, so it's ready for `accept()`.
   //
   // `flags` is a bitwise-OR of the values of the `Flags` enum.
 
   virtual Own<DatagramPort> wrapDatagramSocketFd(Fd fd, NetworkFilter& filter, uint flags = 0);
+  inline Own<DatagramPort> wrapDatagramSocketFd(Fd fd, uint flags = 0) {
+    return wrapDatagramSocketFd(fd, NetworkFilter::getAllAllowed(), flags);
+  }
 
   virtual Timer& getTimer() = 0;
   // Returns a `Timer` based on real time.  Time does not pass while event handlers are running --