Enhanced LAN authentication suggestion for the Server readme

[ahaverty]

Regarding the server instructions, and the suggestion to turn on 'Non-LAN' authentication:

Set Authentication to be Non-LAN only. Leave Use secure session keys and login page unchecked. The secure session option uses HTTP_DIGEST_AUTHENTICATION, which isn't fully supported throughout the Home Assistant codebase yet. Also, in the case you want to use Casting and/or Streaming, some media player devices don't support using authentication.

I've had success with requiring authentication for "All Connections" + secure session keys (Settings>WebServer>Advanced)

I'm using the IP Address limit rule to set my home assistant IP (set up as static on my LAN) with automatic admin user, e.g:
^192.168.1.123

From Blue Iris' PDF:

^ allow this address without authentication using the account ‘admin’; this account must exist and it must be enabled (use caution here).

Context:
I'm only using HA with Blue Iris for mobile notifications with image attachments, but I can see with the above settings, that HA can access the images still, and can also stream live-feeds in lovelace camera views too. Perhaps the above won't work for the likes of casting etc, but this might be a good suggestion for people that are mainly using HA for notifications, or have reverse proxy's such as #23

I believe the above now saves me worrying about someone accessing my LAN and having free roam on my entire NVR!