Suggested settings to add to OpenVPN

[sebastian]

I would suggest adding the following settings to the OpenVPN setup page, BEFORE advanced section is removed. Some VPN providers require these to work:

1: checkbox for "persist-tun" (Keep tun interface up even when connection is down)
2: checkbox for "persist-key" (Keep key intact between connections)
3: checkbox for "auth-retry nointeract" (Retry automatically on authentication error) (The reason this is required, is that some VPN providers do have a "device limit", for example 1 device per account, and if you suddely lose connection, it will take some time for the "device limit" to reset, and if OpenVPN shuts down due to AUTH_FAIL, then you have to manually interact each time OpenVPN loses connection, but if it retry, it will retry until device limit is auto-resetted.)
4: Key direction for Static key (dropdown)
5: IP and mask setting (2 textboxes) - correspond to ifconfig <IP> <MASK> - required for static-IP VPNs
6: Setting for remote-cert-tls (dropdown)
8: Checkbox for "mute replay warnings"
9: textbox for "reneg-sec"
10: textbox for "replay-window"