take into account DNAME

src/core/ngx_resolver.c

diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 2763b86..f0d675a 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -1186,6 +1186,9 @@
         } else if (qtype == NGX_RESOLVE_CNAME) {
             cname = &buf[i] + sizeof(ngx_resolver_an_t);
             i += sizeof(ngx_resolver_an_t) + len;
+
+        } else if (qtype == NGX_RESOLVE_DNAME) {
+            i += sizeof(ngx_resolver_an_t) + len;
         }
     }
 

src/core/ngx_resolver.h

diff --git a/src/core/ngx_resolver.h b/src/core/ngx_resolver.h
index 8f8b060..0086d6a 100644
--- a/src/core/ngx_resolver.h
+++ b/src/core/ngx_resolver.h
@@ -17,6 +17,7 @@
 #define NGX_RESOLVE_PTR       12
 #define NGX_RESOLVE_MX        15
 #define NGX_RESOLVE_TXT       16
+#define NGX_RESOLVE_DNAME     39
 
 #define NGX_RESOLVE_FORMERR   1
 #define NGX_RESOLVE_SERVFAIL  2