IRule condtion for one mor more slashes in URL

Or better still change it to use "HTTP::path" instead:

when HTTP_REQUEST {
    if { [HTTP::path] ends_with "//" } {
        set new_path [string trimright [HTTP::path] '/']
        HTTP::path "$new_path/"
    }
    if { [HTTP::path] equals "/" } {  
        HTTP::redirect "https://[HTTP::host]/web/guest/cna/home"
    }
}