Another resolver question

[Paul A Vixie]

> I see that "options no-check-names" was introduced to the
> resolver in 8.2.  Was name checking introduced to the
> resolver then, too, or had it been there for some time without
> a way to turn it off?  (I seem to remember some name
> checking messages from BIND 4.9.x resolvers, but I could
> be wrong.)

there was, before that option, no way to turn it off other than changing
_res after calling res_init().  making it an option caused it to be 
settable as a system default (in /etc/resolv.conf) or an environment
default (in RES_OPTIONS).