[lwip-devel] [task #7017] Implement DNS client

[Frédéric Bernon]

Follow-up Comment #78, task #7017 (project lwip):

>I would like to move the creation of the udp pcb dns uses from dns_init to a
function called the first time dns_gethostbyname so the pcb isn't created
until it is really used.

I have a real preference that all permanent services were created at the
product startup, and not when at the time it's need. Since once it's created,
it is not free, so, there is no reason to change the allocation place to my
point of view. And if a user doesn't need it, he can always disable it with
LWIP_DNS=0. Current behavior is more determinist.

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