nslookup: complete on hosts (Alioth: #314673)

completions/nslookup

@@ -39,6 +39,14 @@ _nslookup()
             -domain= -search -nosearch -port= -querytype= -recurse -norecurse
             -retry= -timeout= -vc -novc -fail -nofail' -- "$cur" ) )
         [[ $COMPREPLY == *= ]] && compopt -o nospace
+        return
+    fi
+
+    local args
+    _count_args =
+    if [[ $args -le 2 ]]; then
+        _known_hosts_real "$cur"
+        [[ $args -eq 1 && $cur == @(|-) ]] && COMPREPLY+=( - )
     fi
 } &&
 complete -F _nslookup nslookup