Allow setting other login url than the default.

Allow setting other login url than the default:

  https://\<host\>:\<port\>/dana-na/auth/url_default/login.cgi

so we can login on a vpn login page which needs an url like:

  https://\<host\>:\<port\>/dana-na/auth/url_9/login.cgi (example)

Signed-off-by: Gert Hulselmans <hulselmansgert@gmail.com>