samples: net: irc_bot: add DNS support

When CONFIG_DNS_RESOLVER is active, the PEER config will be ignored and
instead a DNS query for DEFAULT_SERVER will be used.

Change-Id: If2c699944027f3c6a8ae9654f9cda0d7dca387c8
Signed-off-by: Michael Scott <michael.scott@linaro.org>
3 files changed