Apache canonical host

[jpmckinney]

closes #677

[jpmckinney]

Thank you for the review! The config would now render as:

<MDomain www.open-contracting.org open-contracting.org>
    MDRequireHttps permanent
</MDomain>

<VirtualHost *:80>
    ServerName www.open-contracting.org
    ServerAlias open-contracting.org
</VirtualHost>

<VirtualHost *:443>
    ServerName open-contracting.org
    SSLEngine on
    Protocols h2 http/1.1 acme-tls/1

    Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"

    RewriteEngine on
    RewriteRule ^ https://www.open-contracting.org%{REQUEST_URI} [R=301,L]
</VirtualHost>

<VirtualHost *:443>
    ServerName www.open-contracting.org
    SSLEngine on
    Protocols h2 http/1.1 acme-tls/1

    ErrorLog  /var/log/apache2/corporate/error.log
    CustomLog /var/log/apache2/corporate/access.log vhost_combined env=!dontlog

    Include /etc/apache2/sites-available/corporate.conf.include
</VirtualHost>

[jpmckinney]

Noting that this extends env=!dontlog into these logs, so I think we have no way to know if AppBeat, Pingdom, or /server-status checks ever start behaving badly/unexpectedly.