-| Insert (KEY, VALUE). If KEY already existed, overwrite the |
-| previous value. Uses MUSCLE_OBSTACK. De-allocates the previously |
-| associated value. VALUE and SEPARATOR are copied. |
+| Append VALUE to the current value of KEY. If KEY did not already |
+| exist, create it. Use MUSCLE_OBSTACK. De-allocate the previously |
+| associated value. Copy VALUE and SEPARATOR. |