[rancid] filtering of show license

[Václav Ovsík]

Hi,
with Rancid 3.4.1 a new information is digged from IOS using
    show license
but it contains relative (changing) time :-/ e.g.:

    Index 3 Feature: securityk9
	    Period left: 5  days 7  hours
	    Period Used: 7  weeks 5  days

have anybody already solved this? (change to end-of-license time or so)
Thanks
-- 
Zito