Refine rss build logic (#545)

* Add refine rss build logic

* Switch to .RelPermalink since URL is deprecated

layouts/_default/rss.xml

@@ -1,10 +1,12 @@
 {{- $pctx := . -}}
 {{- if .IsHome -}}{{ $pctx = .Site }}{{- end -}}
 {{- $pages := slice -}}
-{{- if or $.IsHome $.IsSection -}}
+{{- if $.IsHome -}}
+{{- $pages = $pctx.RegularPages -}}
+{{- else if $.IsSection -}}
 {{- $pages = $pctx.RegularPagesRecursive -}}
 {{- else -}}
-{{- $pages = $pctx.Pages -}}
+{{- $pages = $pctx.RegularPagesRecursive -}}
 {{- end -}}
 {{- $limit := .Site.Config.Services.RSS.Limit -}}
 {{- if ge $limit 1 -}}
@@ -26,7 +28,7 @@
     {{ printf "<atom:link href=%q rel=\"self\" type=%q />" .Permalink .MediaType | safeHTML }}
     {{- end -}}
     {{ range $pages }}
-    {{- if ne .URL "search" -}}
+    {{- if ne .RelPermalink "/search/" -}}
     <item>
       <title>{{ .Title }}</title>
       <link>{{ .Permalink }}</link>