managesieve-login: Correctly adjust to core login-common API changes.

Previous commit was accidentally for an earlier version of the API change.

src/managesieve-login/client.c

@@ -522,11 +522,15 @@ static struct client_vfuncs managesieve_client_vfuncs = {
 	.free = client_common_default_free,
 };
 
-static const struct login_binary managesieve_login_binary = {
+static struct login_binary managesieve_login_binary = {
 	.protocol = "sieve",
 	.process_name = "managesieve-login",
 	.default_port = 4190,
 
+	.event_category = {
+		.name = "managesieve",
+	},
+
 	.client_vfuncs = &managesieve_client_vfuncs,
 	.preinit = managesieve_login_preinit,
 	.init = managesieve_login_init,
@@ -535,10 +539,6 @@ static const struct login_binary managesieve_login_binary = {
 	.anonymous_login_acceptable = FALSE,
 };
 
-struct event_category login_event_category = {
-	.name = "managesieve",
-};
-
 int main(int argc, char *argv[])
 {
 	return login_binary_run(&managesieve_login_binary, argc, argv);