Make merch sale display conditional based on a param in site config

[carrythebanner]

2nd round of merch sales end on June 11th; don't merge this change before June 12.

[ionous]

nice! i like the config variable.
if you want a shortcut, instead of:
{{ if eq (.Param "festival.merchSaleActive") true }}{{ partial "cal/pp-merch.html" . }}{{ end }}

this should also work:
{{ if .Site.Params.festival.merchSaleActive }}{{ partial "cal/pp-merch.html" . }}{{ end }}

[carrythebanner]

Thanks @ionous! Definitely prefer that simpler syntax, I'll update (and use it in a couple of other similar checks).