DOCS-473 db.currentOp doc distinguish btwn v2.2 and prior fields

Author: kay-kim

source/reference/current-op.txt

@@ -156,6 +156,8 @@ Output Reference
 
 .. data:: locks
 
+   .. versionadded:: 2.2
+   
    The :data:`locks` document reports on the kinds of locks the
    operation currently holds. The following kinds of locks are possible:
 
@@ -177,6 +179,18 @@ Output Reference
       :data:`locks.^<database>` reports on the lock state for the
       database that this operation targets.
 
+   :data:`locks` replaces ``lockType`` in earlier versions.
+
+.. data:: lockType
+
+   *Removed in version 2.2.*
+   
+   Identifies the type of lock the operation currently holds. The
+   possible values are:
+
+   - ``read``
+   - ``write``
+
 .. data:: waitingForLock
 
    Returns a boolean value. :data:`waitingForLock` is ``true`` if the
@@ -186,8 +200,27 @@ Output Reference
 .. data:: msg
 
    The :data:`msg` provides a message that describes the status and
-   progress of the operation. In the case of indexing operations, the
-   field reports the completion percentage.
+   progress of the operation. In the case of indexing or mapReduce
+   operations, the field reports the completion percentage.
+
+.. data:: progress
+
+   Reports on the progress of mapReduce or indexing operations. The
+   :data:`progress` fields corresponds to the completion percentage in
+   the :data:`msg` field. The :data:`progress` specifies the following
+   information:
+   
+   .. data:: done
+   
+      Reports the number completed.
+      
+   .. data:: total
+   
+      Reports the total number.
+
+.. data:: killed
+
+   Reports ``true`` if the operation is killed.
 
 .. data:: numYields
 
@@ -201,6 +234,8 @@ Output Reference
 
 .. data:: lockStats
 
+   .. versionadded:: 2.2
+   
    The :data:`lockStats` document reflects the amount of time the
    operation has spent both acquiring and holding
    locks. :data:`lockStats` reports data on a per-lock type, with the