The specific error appears to be related to the use of getaddrinfo, perhaps dependant on particular networking or name server configurations. A locally reproduced postinst error is:
Setting up proftpd (1.3.0-21ubuntu1) ...
* Starting ftp server proftpd
- IPv4 getaddrinfo 'frigga' error: Name or service not known
- warning: unable to determine IP address of 'frigga'
- error: no valid servers configured
- Fatal: error processing configuration file '/etc/proftpd/proftpd.conf'
The specific error appears to be related to the use of getaddrinfo, perhaps dependant on particular networking or name server configurations. A locally reproduced postinst error is:
Setting up proftpd (1.3.0-21ubuntu1) ... proftpd. conf'
* Starting ftp server proftpd
- IPv4 getaddrinfo 'frigga' error: Name or service not known
- warning: unable to determine IP address of 'frigga'
- error: no valid servers configured
- Fatal: error processing configuration file '/etc/proftpd/