Sync rootwrap.conf from oslo.rootwrap
The current rootwrap.conf file is outdated and doesn't include some
parameters. This change updates the content to make it consistent with
the latest example file in oslo.rootwrap.
@@ -25,3 +25,9 @@ syslog_log_facility=syslog
# INFO means log all usage
# ERROR means only log unsuccessful attempts
syslog_log_level=ERROR
+
+# Rootwrap daemon exits after this seconds of inactivity
+daemon_timeout=600
+
+# Rootwrap daemon limits itself to that many file descriptors (Linux only)
+rlimit_nofile=1024
