[krbdev.mit.edu #3172] AIX 4.x ns_ninit corrupts memory due to incompatibility with resolv.h

[Tom Yu via RT]

Thanks for the report.  If you have access to both AIX 4.x and AIX 5.x
systems, could you tell us whether res_ndestroy() is present in the
headers, and whether it can be linked?  I'm attempting to update our
strategy for determining whether to use res_ninit().