data/make_man.sh: fixed missing getopts shift

removed accidentally by 7c0bd41

Now it is shifted after the while-loop (not `shift` in every while
iteration) - should behave the same but this is canonical according to
getopts man (w/o needless '$' before OPTIND).

data/make_man.sh

@@ -189,6 +189,7 @@ while getopts dhkn name; do
 		;;
 	esac
 done
+shift $((OPTIND - 1))
 
 if [ $# -eq 0 ]; then
 	usage