Add warnings for missing custom-setup stanzas
Add warnings for missing custom-setup stanzas

juhp/stack,mrkkrp/stack,anton-dessiatov/stack,MichielDerhaeg/stack,Fuuzetsu/stack,juhp/stack,anton-dessiatov/stack,MichielDerhaeg/stack,martin-kolinek/stack,martin-kolinek/stack,mrkkrp/stack,Fuuzetsu/stack