Use "modern" SSLCipherSuite per Mozilla recommendations.
See https://wiki.mozilla.org/Security/Server_Side_TLS for details.
Removes RC4 cipher. Fixes issue #341.
Also explicitly disabled SSLCompression and enables OCSP stapling.
We should put all these settings in
/etc/apache2/mods-enabled/ssl.conf
to avoid duplication...
Remove all configuration for MySQL and configure PostgreSQL as the main
database.
All *_mysql_* options have been changed to *_db_* options.
Postgres requires the database user to have a password in order to
connect via localhost. The db_admin_password option is used to set the
password of the admin user (usually postgres).