Upgrade stetsonia to use Ubuntu 16.04 LTS about semantic-mediawiki.org

[kghbln]

@JeroenDeDauw @mwjames

This is now a scheduled for Dec 2016 thing. This release of Ubuntu ships with MySQL 5.7 and PHP 7.0

[kghbln]

I will probably be doing this on Sunday 4, 2016. Let's see how Ubuntu behaves.

• upgrading to LTS - does not work if you are not already on LTS
• how to - worked perfect

@JeroenDeDauw Just to make sure. It is possible to upgrade the existing VM?!

[kghbln]

This is now happening. Keeping fingers crossed.

[kghbln]

Well this is quite unexpected. I believe the server upgrade worked well but now it seems that SMW is not ready for MySQL 5.7

[kghbln]

For the record. The upgrade as such took 30 minutes.

[kghbln]

The upgrade was to

Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.1 LTS
Release:	16.04
Codename:	xenial

which is cool and in "/etc/upgrade-manager" we have Prompt=lts

[kghbln]

This was the reason why I imperatively had to upgrade: The cert was to expire next week and since StartSSL was removed from trust in Fx and Ch we would have had worries starting in January even with a renewed and valid StartSSL cert. Now both "www.s-mw.o" and "doc.s-mw.o" are serving with Let's encrypt certs. Doing this on 15.10 would have been painful.

[kghbln]

For the record: (this also applies to <doc.semantic-mediawiki.o>