Add zip and unzip functionality to Midnight Commander's user menu (F2)

menu

+ t r & ! t t
u       Zip or unzip selected file
        if [ %x = "zip" ]; then
            unzip %f
        else
            zip %b.zip %f
        fi

+ t t
u       Zip tagged files
        echo -n "Archive name [archive]: "
        read filename
        [ "$filename"x = x ] && filename="archive"
        zip "$filename".zip %t