In some systems, Ganglia fails to start at boot, logging a message like
the following:

/usr/sbin/gmond[2854]: Unable to create tcp_accept_channel. Exiting.#012


In this particular case, it was a Xen Cloud Platform (XCP) dom0 host.
XCP configures the IP addresses on the NICs in a non-standard manner,
they are not configured by the normal networking boot scripts.  gmond
has tried to start before the NICs were configured.

The retry_bind option was added for UDP channels and it can probably be
added to the TCP config as well to solve this issue.