Don't reload auth_opt_ options on reload.

This matches the behaviour of the other plugin options.

Closes #1068. Thanks to Jason McFadyen.

Bug: #1068

ChangeLog.txt

@@ -11,6 +11,8 @@ Broker:
  network is down. Closes #1062.
 - Fix outgoing retained messages not being sent by bridges on initial
  connection. Closes #1040.
+- Don't reload auth_opt_ options on reload, to match the behaviour of the
+ other plugin options. Closes #1068.
 
 Library:
 - Fix reconnect delay backoff behaviour. Closes #1027.

src/conf.c

@@ -818,6 +818,7 @@ int config__read_file_core(struct mosquitto__config *config, bool reload, struct
  conf__set_cur_security_options(config, cur_listener, &cur_security_options);
  if(conf__parse_bool(&token, "allow_zero_length_clientid", &cur_security_options->allow_zero_length_clientid, saveptr)) return MOSQ_ERR_INVAL;
  }else if(!strncmp(token, "auth_opt_", 9)){
+ if(reload) continue; // Auth plugin not currently valid for reloading.
  if(!cur_auth_plugin_config){
  log__printf(NULL, MOSQ_LOG_ERR, "Error: An auth_opt_ option exists in the config file without an auth_plugin.");
  return MOSQ_ERR_INVAL;