AIX have broken res_nsearch() in 5.1 (5.0 also ?) so just don't use res_nsearch on AIX
AIX have broken res_nsearch() in 5.1 (5.0 also ?)
so just don't use res_nsearch on AIX


git-svn-id: 193148810cf65385f3a195dbc9a8b504846da3a2@12431 ec53bebd-3082-4978-b11e-865c3cabbd6b

madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal