Allow to config dns bind address in DnsNameResolver (#11061)

Motivation:

The DnsResolver default start address listen to "0.0.0.0", which may be not what the user wants. 

Modification:

Add localAddress as a param of DnsNameResolver and its builder

Result:

The DnsNameResolver's bind address can be configured.

resolver-dns/src/main/java/io/netty/resolver/dns/DnsNameResolver.java

@@ -383,6 +383,35 @@ public DnsNameResolver(
             int ndots,
             boolean decodeIdn,
             boolean completeOncePreferredResolved) {
+        this(eventLoop, channelFactory, socketChannelFactory, resolveCache, cnameCache, authoritativeDnsServerCache,
+                null, dnsQueryLifecycleObserverFactory, queryTimeoutMillis, resolvedAddressTypes,
+                recursionDesired, maxQueriesPerResolve, traceEnabled, maxPayloadSize, optResourceEnabled,
+                hostsFileEntriesResolver, dnsServerAddressStreamProvider, searchDomains, ndots, decodeIdn,
+                completeOncePreferredResolved);
+    }
+
+    DnsNameResolver(
+            EventLoop eventLoop,
+            ChannelFactory<? extends DatagramChannel> channelFactory,
+            ChannelFactory<? extends SocketChannel> socketChannelFactory,
+            final DnsCache resolveCache,
+            final DnsCnameCache cnameCache,
+            final AuthoritativeDnsServerCache authoritativeDnsServerCache,
+            SocketAddress localAddress,
+            DnsQueryLifecycleObserverFactory dnsQueryLifecycleObserverFactory,
+            long queryTimeoutMillis,
+            ResolvedAddressTypes resolvedAddressTypes,
+            boolean recursionDesired,
+            int maxQueriesPerResolve,
+            boolean traceEnabled,
+            int maxPayloadSize,
+            boolean optResourceEnabled,
+            HostsFileEntriesResolver hostsFileEntriesResolver,
+            DnsServerAddressStreamProvider dnsServerAddressStreamProvider,
+            String[] searchDomains,
+            int ndots,
+            boolean decodeIdn,
+            boolean completeOncePreferredResolved) {
         super(eventLoop);
         this.queryTimeoutMillis = queryTimeoutMillis > 0
             ? queryTimeoutMillis
@@ -453,7 +482,12 @@ protected void initChannel(DatagramChannel ch) {
         });
 
         channelFuture = responseHandler.channelActivePromise;
-        ChannelFuture future = b.register();
+        final ChannelFuture future;
+        if (localAddress == null) {
+            future = b.register();
+        } else {
+            future = b.bind(localAddress);
+        }
         Throwable cause = future.cause();
         if (cause != null) {
             if (cause instanceof RuntimeException) {

resolver-dns/src/main/java/io/netty/resolver/dns/DnsNameResolverBuilder.java

@@ -25,6 +25,7 @@
 import io.netty.resolver.ResolvedAddressTypes;
 import io.netty.util.concurrent.Future;
 
+import java.net.SocketAddress;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -42,6 +43,7 @@ public final class DnsNameResolverBuilder {
     private DnsCache resolveCache;
     private DnsCnameCache cnameCache;
     private AuthoritativeDnsServerCache authoritativeDnsServerCache;
+    private SocketAddress localAddress;
     private Integer minTtl;
     private Integer maxTtl;
     private Integer negativeTtl;
@@ -201,6 +203,16 @@ public DnsNameResolverBuilder authoritativeDnsServerCache(AuthoritativeDnsServer
         return this;
     }
 
+    /**
+     * Configure the address that will be used to bind too. If `null` the default will be used.
+     * @param localAddress the bind address
+     * @return {@code this}
+     */
+    public DnsNameResolverBuilder localAddress(SocketAddress localAddress) {
+        this.localAddress = localAddress;
+        return this;
+    }
+
     /**
      * Sets the minimum and maximum TTL of the cached DNS resource records (in seconds). If the TTL of the DNS
      * resource record returned by the DNS server is less than the minimum TTL or greater than the maximum TTL,
@@ -480,6 +492,7 @@ public DnsNameResolver build() {
                 resolveCache,
                 cnameCache,
                 authoritativeDnsServerCache,
+                localAddress,
                 dnsQueryLifecycleObserverFactory,
                 queryTimeoutMillis,
                 resolvedAddressTypes,