[PATCH rtems-release] rtems-notes-6.md: Add removal of libmisc/serdbg

[Joel Sherrill]

Updates #2828.
---
 rtems-notes-6.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/rtems-notes-6.md b/rtems-notes-6.md
index 70b66a3..7197def 100644
--- a/rtems-notes-6.md
+++ b/rtems-notes-6.md
@@ -262,7 +262,8 @@ The following improvements were made to the RTEMS Shell:
 
 ## General
 
-* TBD
+* The obsolete libmisc/serdbg was removed. Use libdebugger instead. This functionality
+  was not built as part of the 5 release series in anticipation of its removal.
 
 ## Architectures
 
-- 
1.8.3.1