toggle comments at front matter

Whether the comment show up was determined by if the page is under
mainSection, now it's determined by front matter and config.toml

exampleSite/archetypes/default.md

@@ -3,6 +3,8 @@ title: "{{ replace .Name "-" " " | title }}"
 date: {{ .Date }}
 tags: []
 categories: []
+weight: 50
+show_comments: true
 draft: true
 ---
 

layouts/_default/single.html

@@ -39,9 +39,8 @@
         {{ .Content }}
     </div>
 
-    {{ if in .Site.Params.mainSections .Type }}
+    {{ with and .Site.Params.remark42 .Params.show_comments }}
         <hr />
-
         {{ partial "comment.html" . }}
     {{ end }}
 </section>

layouts/partials/head.html

@@ -11,7 +11,7 @@
     <script>mermaid.initialize({ startOnLoad: true });</script>
 {{ end }}
 
-{{ with .Site.Params.remark42 }}
+{{ with and .Site.Params.remark42 .Params.show_comments }}
     <script>
         var remark_config = {
             host: '{{ .host }}',