ClamAV changes on 7

I'm working on the nethserver-mail-filter package and I'm trying to figure out how to port ClamAV configurations to ns7.

Config files for el7 seem like expecting separate instances of clamd, one for each service. Amavisd comes with its .conf:

/etc/clamd.d/amavisd.conf

It seems a common practice, i.e. squidclamav: http://www.server-world.info/en/note?os=CentOS_7&p=squid&f=5

changing the amavis and squid configuration should not be a big effort, but I'm concerned of virus signatures management (file ownership, update policy, different signatures DB for different services). It seems there is much work on this side.

Please, I need your thoughts to go on with amavis.

/cc @dev_team (@giacomo, @davidep, @filippo_carletti, @alep, @stephdl, @Stll0, @alefattorini)