Update to 3.20150107. From the changelog:

[ Joey Hess ]
* Added ikiwiki-comment program.
* Add missing build-depends on libcgi-formbuilder-perl, needed for
  t/relativity.t
* openid: Stop suppressing the email field on the Preferences page.
* po: If msgmerge falls over on a problem po file, print a warning
  message, but don't let this problem crash ikiwiki entirely.
* Set Debian package maintainer to Simon McVittie as I'm retiring from
  Debian.

[ Simon McVittie ]
* calendar: add calendar_autocreate option, with which "ikiwiki --refresh"
  can mostly supersede the ikiwiki-calendar command.
  Thanks, Louis Paternault
* search: add more classes as a hook for CSS. Thanks, sajolida
* core: generate HTML5 by default, but keep avoiding new elements
  like <section> that require specific browser support unless html5 is
  set to 1.
* Tell mobile browsers to draw our pages in a device-sized viewport,
  not an 800-1000px viewport designed to emulate a desktop/laptop browser.
* Add new responsive_layout option which can be set to 0 if your custom
  CSS only works in a large viewport.
* style.css, actiontabs, blueview, goldtype, monochrome: adjust layout
  below 600px ("responsive layout") so that horizontal scrolling is not
  needed on smartphone browsers or other small viewports.
* core: new libdirs option alongside libdir. Thanks, Louis Paternault

[ Amitai Schlair ]
* core: log a debug message before waiting for the lock.
  Thanks, Mark Jason Dominus
* build: in po/Makefile, use the same $(MAKE) as the rest of the build.
  Thanks, ttw
* blogspam: use the 2.0 JSON API (the 1.0 XML-RPC API has been EOL'd).
  Closes: #774441

pkgsrc changes:

Add a not-yet-upstreamed patch to link to the commenter's URL for
anonymous-style comments committed directly via the VCS (i.e.,
imported from another CMS).

(schmonz)