I think that we either:
* need hard dependency on postfix
* need to have a debconf dialog that goes more or less like that:
- if postconf exists, the domain is taken from there
- if not, the current hostname is taken
- then a debconf dialog is shown prefilled with these defaults
- the obtained domain name is used in init scripts
Waht do you think? Tell me if you need help with the second.
I think that a sensible thing to do would be to provide POSTSRSD_OPTS
as 'Environment=...' and then pull a config file with
'EnvironmentFile=-...' (which may contain various configs in comments
too). It seems to be sort-of standard. And, right, if you also use
debconf, then you probably need to pull a file created created in
postinst.