updated ngx-build to avoid applying patches to older nginx cores.

Author: agentzh

ngx-build

@@ -402,9 +402,17 @@ sub apply_patches {
         chdir ".." or die "cannot switch to ..\n";
     }
 
-    chdir "nginx-$version" or die "cannot switch to nginx-$version\n";
-    shell("patch -p1 < $root/../ngx_openresty/patches/nginx-$version-resolver_del_event_invalid_read.patch");
-    chdir ".." or die "cannot switch to ..\n";
+    unless ($ver le '001007004') {
+        chdir "nginx-$version" or die "cannot switch to nginx-$version\n";
+        shell("patch -p1 < $root/../ngx_openresty/patches/nginx-$version-resolver_del_event_invalid_read.patch");
+        chdir ".." or die "cannot switch to ..\n";
+    }
+
+    unless ($ver le '001007004') {
+        chdir "nginx-$version" or die "cannot switch to nginx-$version\n";
+        shell("patch -p1 < $root/../ngx_openresty/patches/nginx-$version-hash_overflow.patch");
+        chdir ".." or die "cannot switch to ..\n";
+    }
 }
 
 sub usage {