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There are two pieces to the face server:
faces is the real server; it should be run on the machine where
the face files live.
faced is the client interface; it should be run on each machine
where faces be available.
faced is a netb face server (start it via faced.go with runfs or setup);
it calls faces when necessary, requests filenames and face data, and
drops the connection when idle to conserve network resources on the
central machine.
faced and faces speak a private protocol, defined (mostly) in faceproto.h.

In the research world, faced and faced.go should be in /usr/netb
everywhere; faces should be run only on kwee.

faced is portable but needs libnetb.a; see /usr/src/netfs.
faces is portable if you adjust the contents of dirent.h,
do something about the call to select in faces.c, and have
libipc.a.  All the network-dependent code is believed to be
in faces.c; perhaps it can be ported to other worlds.

The absolute filenames /usr/net/people.tab and /usr/net/machine.tab
are compiled into faces.c; absolute pathnames for the directories where
faces live are compiled into file.c.  All of these are botches.

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