sip/auth: add algorithm=MD5
@@ -270,6 +270,7 @@ int sip_auth_encode(struct mbuf *mb, struct sip_auth *auth, const char *met,
++realm->nc;
+ err |= mbuf_write_str(mb, ", algorithm=MD5");
err |= mbuf_write_str(mb, "\r\n");
if (err)
break;
