Comment 1 for bug 1276191

According to radosgw man page:
http://ceph.com/docs/dumpling/man/8/radosgw/#options

/etc/ceph/ceph.conf is the default value of this option. If something doesn't work without it explicitly specified, it's a bug in radosgw itself, not its init script.

Please provide more details on how to reproduce this (a specific option that doesn't take a value from /etc/ceph/ceph.conf unless -c option is provided to radosgw on the command line).