The {% if %} tag provides all features of these tags.
Since Django 1.2 (May 17, 2010), the docs have hinted that
{% ifequal %} and {% ifnotequal %} will be deprecated in a future
Django version. Time to make it official.
Thanks to Simon Litchfield for the report, Uninen for the initial
patch, akaihola, jamesp, b.schube, and Florian Appoloner for
subsequent patches, tests, and documentation.