Remove some options keyword expansion, as they are now predefined

src/econf.erl

@@ -546,14 +546,10 @@ sip_uri() ->
 -spec host() -> yconf:validator(binary()).
 host() ->
     fun(Domain) ->
-	    Host = ejabberd_config:get_myname(),
 	    Hosts = ejabberd_config:get_option(hosts),
-	    Domain1 = (binary())(Domain),
-	    Domain2 = misc:expand_keyword(<<"@HOST@">>, Domain1, Host),
-	    Domain3 = (domain())(Domain2),
-	    case lists:member(Domain3, Hosts) of
-		true -> fail({route_conflict, Domain3});
-		false -> Domain3
+	    case lists:member(Domain, Hosts) of
+		true -> fail({route_conflict, Domain});
+		false -> Domain
 	    end
     end.
 

src/ejabberd_http.erl

@@ -932,12 +932,7 @@ listen_opt_type(default_host) ->
 listen_opt_type(custom_headers) ->
     econf:map(
       econf:binary(),
-      econf:and_then(
-	econf:binary(),
-	fun(V) ->
-		misc:expand_keyword(<<"@VERSION@">>, V,
-				    ejabberd_option:version())
-	end)).
+      econf:binary()).
 
 listen_options() ->
     [{ciphers, undefined},

src/ejabberd_options.erl

@@ -112,14 +112,7 @@ opt_type(cache_missed) ->
 opt_type(cache_size) ->
     econf:pos_int(infinity);
 opt_type(captcha_cmd) ->
-    econf:and_then(
-	econf:binary(),
-	fun(V) ->
-		V2 = misc:expand_keyword(<<"@SEMVER@">>, V,
-				    ejabberd_option:version()),
-		misc:expand_keyword(<<"@VERSION@">>, V2,
-				    misc:semver_to_xxyy(ejabberd_option:version()))
-	end);
+    econf:binary();
 opt_type(captcha_host) ->
     econf:binary();
 opt_type(captcha_limit) ->
@@ -493,7 +486,6 @@ 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()} |