Whether Bind (bind-9.10.3-P3) support Edns ?

[johnzeng]

Hello Dear Sir :

Whether Bind (bind-9.10.3-P3) support Edns ? or Maybe we need patch
0001-EDNS0-client-subnet-support.patch for BIND.

if possible , please give me some advisement .

https://gist.github.com/vincentbernat/6524506



Thanks