An initial version of the debian ledgersmb-1.6 package version 1.6.6-2 (package version 2 for LedgerSMB v1.6.6) has been released and uploaded to our PPA[2], for 'cosmic' (v18.10) as well as 'bionic' (v18.04 LTS).
I would have liked to make it available as well on 'xenial (v16.04 LTS), but at least one of the new (for LedgerSMB v1.6.x) dependencies fails to build for it so that needs more investigation. That is the same reason I have not uploaded new package to our apt package repository for 'main' in stretch[1].
The packages at our our PPA: ledgersmb-1.6 ledgersmb-1.6-apache ledgersmb-1.6-lighttpd ledgersmb-1.6-nginx ledgersmb-1.6-varnish
Only the main 'ledgersmb-1.6' package is required; the others are related to which web proxy you might want to use and you only need one of them. Except for the server name, they do try to set up the chosen web proxy automatically for use including (except for the one for varnish) configuring an SSL certificate to use defaulting to the one created by the ssl-cert package.
-- Robert James Clay rjclay@gmail.com, jame@rocasa.us GPG ID: 2448 3AE0 874D 8696 6DCD ECF4 198C AB6F 43B7 EA9A.
[1] https://apt.ledgersmb.org/ [2] https://launchpad.net/~ledgersmb/+archive/ubuntu/main/+packages