Makefile.am: Exclude coap_dtls_context_set_pki_root_cas
Makefile.am: Exclude coap_dtls_context_set_pki_root_cas

Also, exclude coap_endpoint_new_dtls_session() as it is an internal function

authmillenon/libcoap,authmillenon/libcoap,authmillenon/libcoap