resolv() uses getenv_ip() which in turn calls resolv(). Fix
this inifinite loop by not using getenv_ip directly.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Introduce getenv_ip_dns to be able to do not do the resolv when using it in
resolv for the nameserver (Do not loop).
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This is not yet used, but with this the different network
commands can get rid of their global data.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>