Package etesync (and its dependencies)

I put a lot of changes into one commit, would it be better to split it up? If so, how fine, every dependent package one commit? I would do that in another branch of peter-stadler/packages.

@Ansuel: Do you think, I should make a PR already? I would at least complete points 3 (ssl certificate) and 6 (autostart), and do some work on point 7 (conf files) before.

@jeff: I think I am in the wrong subforum, I intended to post this topic to Community Builds, Projects & Packages. Should I post it there, too?