Fix leaks in logger and admin

lib/MySQL_Logger.cpp

@@ -584,6 +584,8 @@ void MySQL_Logger::events_set_base_filename() {
 }
 
 void MySQL_Logger::events_set_datadir(char *s) {
+	if (events.datadir)
+		free(events.datadir);
 	events.datadir=strdup(s);
 	flush_log();
 };
@@ -612,6 +614,8 @@ void MySQL_Logger::audit_set_base_filename() {
 }
 
 void MySQL_Logger::audit_set_datadir(char *s) {
+	if (audit.datadir)
+		free(audit.datadir);
 	audit.datadir=strdup(s);
 	flush_log();
 };

lib/ProxySQL_Admin.cpp

@@ -5033,6 +5033,7 @@ void ProxySQL_Admin::flush_admin_variables___database_to_runtime(SQLite3DB *db,
 						sprintf(q,"DELETE FROM global_variables WHERE variable_name=\"admin-%s\"",r->fields[0]);
 						db->execute(q);
 					}
+					free(val);
 				}
 			} else {
 				proxy_debug(PROXY_DEBUG_ADMIN, 4, "Set variable %s with value \"%s\"\n", r->fields[0],r->fields[1]);