Handle EHOSTUNREACH errors in io.netty.channel.unix.Errors (#13317) (#…

…13318)

Motivation:

    We should throw a NoRouteToHostException when a socket connection fails with EHOSTUNREACH in the same way as
    ENETUNREACH.

    Modifications:

    Add handling for EHOSTUNREACH

    Result:

    Correct exception is thrown.

transport-native-unix-common/src/main/java/io/netty5/channel/unix/Errors.java

@@ -126,7 +126,7 @@ private static String errnoString(int err) {
     }
 
     private static IOException newConnectException0(String method, int err) {
-        if (err == ERROR_ENETUNREACH_NEGATIVE) {
+        if (err == ERROR_ENETUNREACH_NEGATIVE || err == ERROR_EHOSTUNREACH_NEGATIVE) {
             return new NoRouteToHostException();
         }
         if (err == ERROR_EISCONN_NEGATIVE) {