Only compile-tested so far.
Of note is that the WiFi auto-connect (flag) functionality has been removed
from the IDF, and as a follow-on so has the "auto" field in the wifi config.
On the Ethernet side, support for the TLK110 PHY seems to have been removed,
but on the other hand there is now new support for several others.
* ESP32: Add option to set IP/dns config
This commit adds support for setting:
* Hostname
* Static IP / Dns server (Sta mode)
* Changing AP network ip config
* Setting DNS server IP for DHCP
* ESP32: Documentation for setting IP/dns/hostname config
* Documented new functions
* sethostname() now returns true if success