[rancid] *alpha* version of rancid 3.0

[heasley]

if you are not familiar with unix and perl, do not try this alpha version.
i will not tutor users.  that said,

an alpha version of rancid 3.0 is available here:
ftp://ftp.shrubbery.net/pub/rancid/alpha/rancid-3.0a.tar.gz

it includes the typical updates + xirrus support.  but, the bigger bit is
the ability to more easily add device types (as referenced by router.db)
and configure the commands collected for a given device type.

it is a WiP, but its time for feedback.