Add org.apache.log4j.MDC.getContext() to log4j-over-slf4j

gistfile1.diff

diff --git a/log4j-over-slf4j/src/main/java/org/apache/log4j/MDC.java b/log4j-over-slf4j/src/main/java/org/apache/log4j/MDC.java
index 5d80884..d16a7ba 100644
--- a/log4j-over-slf4j/src/main/java/org/apache/log4j/MDC.java
+++ b/log4j-over-slf4j/src/main/java/org/apache/log4j/MDC.java
@@ -16,6 +16,9 @@
 
 package org.apache.log4j;
 
+import java.util.Hashtable;
+import java.util.Map;
+
 public class MDC {
 
   public static void put(String key, String value) {
@@ -41,4 +44,15 @@ public class MDC {
   public static void clear() {
     org.slf4j.MDC.clear();
   }
+  
+  public static Hashtable getContext() {
+    Map map = org.slf4j.MDC.getCopyOfContextMap();
+    
+    if (map != null) {
+      return new Hashtable(map);
+    }
+    else {
+      return new Hashtable();
+    }
+  }
 }