Log Message:
Update to 3.20180105. From the changelog:

- emailauth: Fix cookie problem when user is on https and the cgiurl
  uses http, by making the emailed login link use https.
- passwordauth: Use https for emailed password reset link when user
  is on https.
- Remove openid provider icons from login selector, since openid
  providers are increasingly not working. Verisign retired theirs, and
  aol and yahoo/flickr are not commonly used for openid. Any users who
  still clicked those icons to login will need to instead enter their
  openid url.
- Updated German basewiki and directives translation from
  Sebastian Kuhnert.