Unknown F5 JSON form field type 'select', treating as 'text'.

[stryan at saintnet.tech]

Hi folks,

    Using Openconnect 9.21 on OpenSUSE Tumbleweed.

    I need to interact with an F5 BIG-IP SSL vpn with a web login page. The login page recently added an auth select drop-down for MFA selection: this is causing the following warning in my Openconnect-via-NetworkManager-plasma logs:

WARNING: Unknown F5 JSON form field type 'select', treating as 'text'. Please report to <openconnect-devel at lists.infradead.org>
WARNING: No HTML authentication form found. Extracted form from F5's embedded
  JSON. This is EXPERIMENTAL. Please report results to <openconnect-devel at lists.infradead.org>.

NetworkManager and the OpenConnect command-line both show a "auth_select" form to fill (which I'm assuming is the 'select` field) but no indiciation of what should be there; the webpage has it prefilled in the source like so:
{
    "type": "select",
    "name": "auth_select",
    "caption": "Auth select",
    "value": "",
    "disabled": false,
    "options": [
        {
            "value": "FAKE_MFA_SELECT",
            "text": "Fake MFA Selection Value"
        }
    ]
}

It would be nice if the options could be pre-filled or presented to the user somehow; manually entering the option works but it's a pain to hit the web UI and look for the expected value in the source.

Let me know if you need any more info or testing

Thanks,
Steve