Milter-greylist

> Here is milter-greylist 4.5.7, which is just 4.5.6 with strndup removed:
> 
> ftp://ftp.espci.fr/pub/milter-greylist/milter-greylist-4.5.7.tgz
> MD5 (milter-greylist-4.5.7.tgz) = 1e6a9626792f51cc37aca8a74543c11e
> 
> ChangeLog since 4.5.6:
>         Do not use strndup() for POSIX.1-2001 compatibility
> 

On my system the resolv.h does not contain the following statement:

typedef struct __res_state *res_state;

So I have only __res_state and not res_state.

Does the attached patches break the code for anyone?
If not can it be included into the main stream?

Best,
Attila