Offer to rewrite rsyslog configuration to make it easier to debug xenserver

Given the experimental state of our other packages we need to reduce the
effect of the rate limiter and enable debug-level logging.

Fixes #3

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Correct a misleading error message.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>