commit bash-20170407 snapshot

doc/bashref.texi

@@ -4360,6 +4360,8 @@ Options, if supplied, have the following meanings:
 @item -d
 The first character of @var{delim} is used to terminate each input line,
 rather than newline.
+If @var{delim} is the empty string, @code{read} will terminate a line
+when it reads a NUL character.
 @item -n
 Copy at most @var{count} lines.  If @var{count} is 0, all lines are copied.
 @item -O