Typo and comment fix

Reviewed By: marc


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665189 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/concurrency/PosixThreadFactory.h b/lib/cpp/src/concurrency/PosixThreadFactory.h
index 9a9e2af..0f12fc9 100644
--- a/lib/cpp/src/concurrency/PosixThreadFactory.h
+++ b/lib/cpp/src/concurrency/PosixThreadFactory.h
@@ -63,12 +63,7 @@
    * when it completes.  A detachable thread is not joinable.  The join method
    * of a detachable thread will return immediately with no error.
    *
-   * Joinable threads will detach themselves iff they were not explicitly joined and
-   * there are no remaining strong references to the thread.  This guarantees that
-   * joinnable threads don't leak resources even when the application neglects to
-   * call join explicitly.
-   *
-   * By default threads are joinable.
+   * By default threads are not joinable.
    */
 
   PosixThreadFactory(POLICY policy=ROUND_ROBIN, PRIORITY priority=NORMAL, int stackSize=1, bool detached=true);