Add ssl_set_hs_ca_chain()
diff --git a/library/ssl_srv.c b/library/ssl_srv.c
index ea015ae..e83466e 100644
--- a/library/ssl_srv.c
+++ b/library/ssl_srv.c
@@ -2725,7 +2725,9 @@
      * opaque DistinguishedName<1..2^16-1>;
      */
     p += 2;
-    crt = ssl->conf->ca_chain;
+    crt = ssl->handshake->sni_ca_chain != NULL ?
+          ssl->handshake->sni_ca_chain :
+          ssl->conf->ca_chain;
 
     total_dn_size = 0;
     while( crt != NULL && crt->version != 0 )