Define the types of options that opt_type.sh cannot derive automatically

src/ejabberd_options.erl

@@ -491,6 +491,7 @@ opt_type(jwt_auth_only_rule) ->
 		    {c2s_protocol_options, undefined | binary()} |
                     {s2s_ciphers, undefined | binary()} |
                     {c2s_ciphers, undefined | binary()} |
+		    {captcha_cmd, undefined | binary()} |
 		    {websocket_origin, [binary()]} |
 		    {disable_sasl_mechanisms, [binary()]} |
 		    {s2s_zlib, boolean()} |

src/mod_matrix_gw.erl

@@ -873,6 +873,9 @@ mod_opt_type(matrix_id_as_jid) ->
 mod_opt_type(persist) ->
     econf:bool().
 
+-spec mod_options(binary()) -> [{key, {binary(), binary()}} |
+                                {atom(), any()}].
+
 mod_options(Host) ->
     [{matrix_domain, Host},
      {host, <<"matrix.", Host/binary>>},