Added a 'htmlfilters' tag library containing 'removetags'

- Legacy-Id: 12823

ietf/utils/templatetags/htmlfilters.py

@@ -0,0 +1,17 @@
+# Copyright the IETF Trust 2017, All Rights Reserved
+
+from __future__ import unicode_literals
+
+from django.template.library import Library
+from django.template.defaultfilters import stringfilter
+
+from ietf.utils.html import remove_tags
+
+register = Library()
+
+@register.filter(is_safe=True)
+@stringfilter
+def removetags(value, tags):
+    """Removes a space separated list of [X]HTML tags from the output."""
+    return remove_tags(value, tags)
+