Add an extra 2 Arg types to the config file parsing code

Reorder the existing ones to match the order in the Arg.html doc
on caml.inria.fr

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Remove the 2 extra types from Arg

They would lead to confusion if they were ever specified in the
config file.

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
When daemonizing, set log output to syslog

We'll probably want something a bit more configurable
than this in the future.

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>