Provide a default configuration file for lsyncd

[Karl-Philipp Richter]

The package should provide a default configuration file which doesn't need to include any settings, but give an overview of possible configuration directive in the form of text and example comments.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: lsyncd 2.1.6-1
Uname: Linux 4.15.18-041518-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Aug 25 11:31:10 2018
SourcePackage: lsyncd
UpgradeStatus: Upgraded to bionic on 2018-04-30 (116 days ago)

[silverwind (silverwind+)]

I agree, there should be a example configuration file and if logging is enabled in that file, also a logrotate file for that log file. It could be:

settings {
  logfile = "/var/log/lsyncd/lsyncd.log",
  nodaemon = false,
}

And for example /etc/logrotate.d/lsyncd:

/var/log/lsyncd/*.log {
  daily
  compress
  missingok
  rotate 10
  dateext
  copytruncate
}