Comment on @doubt entries

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/branches/BRANCH_2_0_EXPERIMENTAL/rgoers@949488 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/log4j2-api/src/main/java/org/apache/logging/log4j/MDC.java b/log4j2-api/src/main/java/org/apache/logging/log4j/MDC.java
index 9113d7d..1e0a341 100644
--- a/log4j2-api/src/main/java/org/apache/logging/log4j/MDC.java
+++ b/log4j2-api/src/main/java/org/apache/logging/log4j/MDC.java
@@ -33,7 +33,7 @@
  * child thread automatically inherits a <em>copy</em> of the mapped
  * diagnostic context of its parent.
  *
- * @doubt I'd throw the concept into a ThreadContext object.
+ * @doubt I'd throw the concept into a ThreadContext object. (RG) I agree - will revise this.
  */
 public final class MDC {
 
diff --git a/log4j2-api/src/main/java/org/apache/logging/log4j/NDC.java b/log4j2-api/src/main/java/org/apache/logging/log4j/NDC.java
index fb801d7..6c9d1f5 100644
--- a/log4j2-api/src/main/java/org/apache/logging/log4j/NDC.java
+++ b/log4j2-api/src/main/java/org/apache/logging/log4j/NDC.java
@@ -83,7 +83,10 @@
  * method. A thread may obtain a copy of its NDC with the {@link
  * #cloneStack cloneStack} method and pass the reference to any other
  * thread, in particular to a child.
- *  @doubt I'd combine MDC and NDC into a single ThreadContext object.
+ *  @doubt I'd combine MDC and NDC into a single ThreadContext object. (RG) To be
+ * honest, I've always doubted the practicality of this class. An errant
+ * app that forgets to pop an element will screw it up. I only added it
+ * because Log4J 1.x supports it and it wasn't particularly hard to carry over.
  */
 public class NDC {