esp32/network_ppp: Add ppp_set_usepeerdns(pcb, 1) when init'ing iface.
esp32/network_ppp: Add ppp_set_usepeerdns(pcb, 1) when init'ing iface.

Without this you often don't get any DNS server from your network provider.
Additionally, setting your own DNS _does not work_ without this option set
(which could be a bug in the PPP stack).

pfalcon/micropython,bvernoux/micropython,pfalcon/micropython,pramasoul/micropython,pozetroninc/micropython,bvernoux/micropython,tobbad/micropython,adafruit/circuitpython,henriknelson/micropython,trezor/micropython,selste/micropython,MrSurly/micropython,kerneltask/micropython,MrSurly/micropython,tobbad/micropython,adafruit/circuitpython,pozetroninc/micropython,adafruit/circuitpython,selste/micropython,henriknelson/micropython,tobbad/micropython,pramasoul/micropython,pozetroninc/micropython,bvernoux/micropython,pfalcon/micropython,kerneltask/micropython,pozetroninc/micropython,bvernoux/micropython,trezor/micropython,kerneltask/micropython,pramasoul/micropython,pozetroninc/micropython,selste/micropython,kerneltask/micropython,adafruit/circuitpython,trezor/micropython,pfalcon/micropython,tobbad/micropython,MrSurly/micropython,selste/micropython,pramasoul/micropython,trezor/micropython,kerneltask/micropython,tobbad/micropython,selste/micropython,henriknelson/micropython,henriknelson/micropython,adafruit/circuitpython,trezor/micropython,henriknelson/micropython,MrSurly/micropython,MrSurly/micropython,adafruit/circuitpython,bvernoux/micropython,pfalcon/micropython,pramasoul/micropython