[syslog-ng] Two instances of syslog-ng on the same host?

[John R. Dunning]

Hi wizards.  Apologies if this is an FAQ or something, but I've dug
all around and failed to find the answer.

I have a system on which, for reasons I'd rather not go into here, it
makes sense to run two instances of syslog-ng, one for standard
logging of local events, the other acting as a proxy for a flock of
other systems.

The proxy starts first, very early in the init sequence, the regular
one starts later.

This all worked great with syslog-ng 2, but I recently upgraded to
version 3.1.1 and I can't get it to work correctly.  The proxy
instance is supposed to only be listening on a tcp socket, but it
seems to also be opening the AF_UNIX socket to /dev/log.  This causes
the launch of the main instance to fail.

I've been through the docs, but it's not obvious to me how to get
syslog-ng to start without opening the socket to /dev/log.  Hints?
Thanks in advance...