Bug fix (NAPTR record parsing)

Author: sergey-lukin

lib/resty/dns/resolver.lua

@@ -532,13 +532,11 @@ local function parse_section(answers, section, buf, start_pos, size,
             end
             ans.regexp = regexp_str
 
-            if p - pos < len then
-                local replacements_str,p = _decode_name(buf, p)
-                if not replacements_str
-                    then return nil, pos
-                end
-                ans.replacements = replacements_str
+            local replacements_str,p = _decode_name(buf, p)
+            if not replacements_str
+                then return nil, pos
             end
+            ans.replacements = replacements_str
 
             if p - pos ~= len then
                 return nil, format("bad NAPTR record length: %d ~= %d",