undefine dup for SSLContext and SSLSocket

Author: kares

src/main/java/org/jruby/ext/openssl/SSLContext.java

@@ -180,6 +180,7 @@ public static void createSSLContext(final Ruby runtime, final RubyModule SSL) {
         SSLContext.defineAlias("ssl_timeout=", "timeout=");
 
         SSLContext.defineAnnotatedMethods(SSLContext.class);
+        SSLContext.undefineMethod("dup");
 
         final Set<String> methodKeys = SSL_VERSION_OSSL2JSSE.keySet();
         final RubyArray methods = runtime.newArray( methodKeys.size() );

src/main/java/org/jruby/ext/openssl/SSLSocket.java

@@ -95,6 +95,7 @@ public static void createSSLSocket(final Ruby runtime, final RubyModule SSL) { /
         SSLSocket.addReadWriteAttribute(context, "sync_close");
         SSLSocket.addReadWriteAttribute(context, "hostname");
         SSLSocket.defineAnnotatedMethods(SSLSocket.class);
+        SSLSocket.undefineMethod("dup");
     }
 
     public SSLSocket(Ruby runtime, RubyClass type) {