Migrate our blueprints out of tails.git and tails.boum.org

We want to migrate our blueprints out of our main website and in their own ikiwiki. This will allow us to:

• Be able to push more documents to our blueprints (images, office documents, etc.) without polluting our main repo.
• Lock down all web editing on our main website.
• Allow more people to push changes through Git.
• Host our website on servers that we don’t trust to push to tails.git; ideally, N>1 servers to better resist DDoS (e.g. Tor’s pool of static webservers)

See https://mailman.boum.org/pipermail/tails-dev/2015-March/008517.html

Our main options are:

• Migrate blueprints to a dedicated ikiwiki instance (blueprints.tails.boum.org)
• Use GitLab’s wiki (#15878, https://docs.gitlab.com/ce/user/project/wiki/)

Subtasks

• #9175 (closed)
• #9176
• #9178
• #9179
• #9180
• #9181
• #9182

Related issues

• Related to #15878
• Blocked by #14588 (closed)

Original created by @sajolida on 9174 (Redmine)