Omit "ja_" from the wordpress nginx configuration.

www3232u hosts only one Wordpress site now,
so omit the unnecessary prefix: "ja_".

This commit fixes #124.
Merge branch 'id/124' into dev
Enable munin monitoring of www3232u.

This commit fixes #125.
Merge branch 'id/125' into dev
Introduce template variables to dynamically change the domain name.

This commit fixes #123.
Merge branch 'id/123' into dev
Merge commit '456d0b40c9fa966b5234a097ec2f7b5bcc4932c6' into HEAD