fix TypeError: mw.user.name(...) is null exception

I get this exception when I view an individual post while anonymous.
The log it's trying to decide whether or not to render is
  [FLOW] [FlowAPI] requestFromAnchor error: not an anchor [undefined]

Plus a PHP comment typo.

Change-Id: Ic328f29e7234e456305f97136141427f5de36635
Merge "fix TypeError: mw.user.name(...) is null exception" into frontend-rewrite