redo-sh.do: add mksh to the list of possible shells.

redo-sh.do

@@ -7,7 +7,7 @@ mkdir $1.new
 GOOD=
 WARN=
 
-for sh in dash sh ash ksh ksh88 ksh93 pdksh bash zsh busybox; do
+for sh in dash sh ash mksh ksh ksh88 ksh93 pdksh bash zsh busybox; do
 	printf "Testing %s... " "$sh"
 	FOUND=`which $sh 2>/dev/null` || { echo "missing"; continue; }