avoid changing configuration when adding optional parameters

[vchepkov]

Currently, with each new managed parameter, configuration file gets new 'hanging' comments and empty lines, for example:

# Hardware reference clock drivers


# https://chrony.tuxfamily.org/doc/3.4/chrony.conf.html#leapsecmode

# https://chrony.tuxfamily.org/doc/3.4/chrony.conf.html#maxslewrate

# https://chrony.tuxfamily.org/doc/3.4/chrony.conf.html#smoothtime

Conditionals in the template should encompass optional comments and not to add empty lines, causing unnecessary global service restart

[ekohl]

I think #79 changed the line endings to be more consistent. Mind checking if this is still an issue for you?

[vchepkov]

Yes, template is great now!