Fixed changelog

Docs/manual.texi

@@ -46930,7 +46930,7 @@ not yet 100% confident in this code.
 @itemize @bullet
 @item
 Changed @code{AND/OR} to report that they can return NULL. This fixes a
-small problem in @code{GROUP BY} on @code{AND/OR} expression that return
+bug in @code{GROUP BY} on @code{AND/OR} expression that return
 @code{NULL}.
 @item
 Fixed a bug that @code{OPTIMIZE} of locked and modified MyISAM table,
@@ -47053,6 +47053,9 @@ Linux-x86 binaries.
 @appendixsubsec Changes in release 3.23.50
 @itemize @bullet
 @item
+Fixed buffer overflow problem if someone specified a too long datadir
+parameter to mysqld.
+@item
 Fixed problem with @code{crash-me} and gcc 3.0.4.
 @item
 Fixed that @code{@@@@unknown_variable} doesn't hang server.