Networking docs updates: Access Point, MDNS

[anecdata]

• raspberrypi port-specific notes:

  • start_ap(): max_connections is ignored
  • AP needs to be started before a static IPv4 address can be set (Allow Access Point static IPv4 on the raspberrypi port #7976 (comment))

• potential service slot conflict between web workflow & mdnsports (Out of MDNS service slots  #8149)

[tannewt]

One small reword. Thanks for the updates!

[anecdata]

Do I need to do something else? It seems like GitHub sometimes doesn't recognize that requested changes were made.

[tannewt]

Thank you!