Darren McGrandle 5961b31e91 Enable user definable fetchmail poll times (#731)
* Enable user definable fetchmail poll times
* create new ENV variable FETCHMAIL_POLL in target/start-mailserver.sh
* change --daemon setting in supervisor-app.conf to use ENV var
* Put FETCHMAIL_POLL env variable in Dockerfile to handle case where
  user does not specify it in their docker-compose.yml
2017-10-04 22:10:18 +02:00
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