Take debugHost into account when checking debug port

Fixes: quarkusio#21288

core/deployment/src/main/java/io/quarkus/deployment/dev/QuarkusDevModeLauncher.java

@@ -9,6 +9,7 @@
 import java.net.InetAddress;
 import java.net.Socket;
 import java.net.URI;
+import java.net.UnknownHostException;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -354,7 +355,7 @@ protected void prepare() throws Exception {
             // make sure the debug port is not used, we don't want to just fail if something else is using it
             // we don't check this on restarts, as the previous process is still running
             if (debugPortOk == null) {
-                try (Socket socket = new Socket(InetAddress.getByAddress(new byte[] { 127, 0, 0, 1 }), port)) {
+                try (Socket socket = new Socket(getInetAddress(debugHost), port)) {
                     error("Port " + port + " in use, not starting in debug mode");
                     debugPortOk = false;
                 } catch (IOException e) {
@@ -456,6 +457,13 @@ protected void prepare() throws Exception {
         }
     }
 
+    private InetAddress getInetAddress(String host) throws UnknownHostException {
+        if (host.equals("localhost")) {
+            return InetAddress.getByAddress(new byte[] { 127, 0, 0, 1 });
+        }
+        return InetAddress.getByName(host);
+    }
+
     public Collection<Path> watchedBuildFiles() {
         return buildFiles;
     }