Switch to Quenya when encountering ⟨q⟩ in Sindarin

In Sindarin, ⟨q⟩ or ⟨qu⟩ do not occur, so if we encounter it, the word
must actually be Quenya. Let’s be user-friendly and switch to Quenya in
that case (though I’m not sure how common it would be to encounter a
single Quenya word in a Sindarin text – I suspect it would be more
likely that the user chose the wrong language and really the entire text
is in Quenya).

dictsource/sjn_rules

@@ -126,7 +126,8 @@
 	ph	f
 	A) ph (A	f:
 
-// q does not occur in Sindarin
+.group q
+	q	_^_qya // q does not occur in Sindarin
 
 .group r
 	r	R