Authenticate against multiple password files

Hi,
I have Squid authenticating nicely against a password file, but it would be
very convenient if it could actually work against a number of files, ie check
them all until a match is found (or not found. This would make it easy for us
to add / remove whole year groups of users (we are a school). For instance I
still have all of last years school leavers in the file. Or is there another way to
achieve what I wnat to do?

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Simon Bryan                    sbryan@olmc.nsw.edu.au
Information Technology Manager sbryan@mpx.com.au
OLMC Parramatta