Add webmention/pingback support back in

layouts/_default/baseof.html

@@ -14,6 +14,10 @@
 	{{ with .Site.Params.author }}<meta name="author" content="{{ . }}">{{ end }}
 	{{ $style := resources.Get "style/main.sass" | resources.ToCSS }}
 	<link rel="stylesheet" href="{{ $style.RelPermalink }}">
+
+	{{ with .Site.Params.comments.webmention }}<link rel="webmention" href="{{ . }}" />{{ end }}
+	{{ with .Site.Params.comments.pingback }}<link rel="pingback" href="{{ . }}" />{{ end }}
+
 	{{ if .Site.Params.comments.cactus }}<link rel="stylesheet" href="https://latest.cactus.chat/style.css" type="text/css">{{ end }}
 	{{ with .OutputFormats.Get "RSS" -}}
 		{{ printf `<link rel="%s" type="%s" href="%s" title="%s">` .Rel .MediaType.Type .RelPermalink $.Site.Title | safeHTML }}