Add features and smartos support

[rafecolton]

This pull request adds the following things:

• SmartOS support
• installation of socat for the socket api
• restarting haproxy after rewriting the config (note that a change to the #{{ ansible_managed }} comment does not trigger a restart)
• fix a few typos
• add support for listen sections (in addition to separate frontend and backend sections)
• adjust handling of boolean defaults so they can be turned off by setting value to false (without breaking default vars already set in the role)
• added the following features to individual sections
  • default
  • balance
  • compression
  • http-check
  • global
  • gid
  • uid
  • nbproc
  • stats timeout

NOTE: there was some whitespace change, so this may be more readable with ?w=1

[rafecolton]

Also ping @meatballhat @jszwedko @alexschlessinger for code review

[PierrePaul]

Very awesome work! I will try to get this testing this weekend on both smartos and ubuntu.

Thanks again!

[rafecolton]

FWIW we are using this to set up production SmartOS hosts

[rafecolton]

@PierrePaul bump - any word on this?

[PierrePaul]

Sorry, real life kicked in. I'm on vacation now, should be able to review it at the start of next week. Sorry for the long wait.

[rafecolton]

Ok, thanks for following up :smile:

[PierrePaul]

Everything seems good. This is a major contribution, want me to add your name and your company in the README and the meta/main.yml ?

I was only able to test it under ubuntu (14.04). Some options (like compression) are only possible with the 1.5 version, so I am thinking of adding a note about it in the README file.

[rafecolton]

Sure :smile: works for me

[PierrePaul]

Done ! Commit : af0a8b17c9191fae47d68005582f9200240884ce Sorry it took so much time and thanks again :)

[rafecolton]

Great, thanks!