document != as a filtering operator

diff --git a/man/man5/unlang.5 b/man/man5/unlang.5
index 04118e44865e3a9d1325daba2d43f97683b127d9..4839bb99433c3d092684411d97b3be68d9cf5a16 100644 (file)
--- a/man/man5/unlang.5
+++ b/man/man5/unlang.5
@@ -792,6 +792,9 @@ to match in order for the attribute to remain in the list.
 
 Note that this operator is very different than the '=' operator listed
 above!
+.IP !=
+Keep all attributes with matching name, and value not equal to the
+given one.
 .IP <=
 Keep all attributes having values less than, or equal to, the value
 given here.  Any larger value is replaced by the value given here.  If