-# other glines, omitting the duration or setting it to 0 makes
-# any glines set by this filter be permanent.
+# other Z-lines, omitting the duration or setting it to 0 makes
+# any Z-lines set by this filter be permanent.
+#
+# shun Shun the user for 'duration' length of time. Durations may
+# be specified using the notation 1y2d3h4m6s in a similar way to
+# other X-lines, omitting the duration or setting it to 0 makes
+# any shuns set by this filter be permanent.
+# Requires the shun module to be loaded.