Fix encryption issues in Java 8u231

Author: SupremeMortal

bedrock/bedrock-common/src/main/java/com/nukkitx/protocol/bedrock/util/EncryptionUtils.java

@@ -40,6 +40,11 @@ public class EncryptionUtils {
     private static final KeyPairGenerator KEY_PAIR_GEN;
 
     static {
+        // DO NOT REMOVE THIS
+        // Since Java 8u231, secp384r1 is deprecated and will throw an exception.
+        String namedGroups = System.getProperty("jdk.tls.namedGroups");
+        System.setProperty("jdk.tls.namedGroups", namedGroups.isEmpty() ? "secp384r1" : ", secp384r1");
+
         try {
             KEY_PAIR_GEN = KeyPairGenerator.getInstance("EC");
             KEY_PAIR_GEN.initialize(new ECGenParameterSpec("secp384r1"));