Update nginx documentation (1.13.6)

lib/docs/filters/nginx/clean_html.rb

@@ -30,6 +30,10 @@ module Docs
           node['data-language'] = 'nginx'
         end
 
+        css('code code').each do |node|
+          node.before(node.children).remove
+        end
+
         doc
       end
     end

lib/docs/filters/nginx/entries.rb

@@ -20,7 +20,7 @@ module Docs
       def additional_entries
         css('h1 + ul a').each_with_object [] do |node, entries|
           name = node.content.strip
-          next if name =~ /\A[A-Z]/
+          next if name =~ /\A[A-Z]/ || name.start_with?('/')
 
           id = node['href'].remove('#')
           next if id.blank?

lib/docs/scrapers/nginx.rb

@@ -2,7 +2,7 @@ module Docs
   class Nginx < UrlScraper
     self.name = 'nginx'
     self.type = 'nginx'
-    self.release = '1.13.4'
+    self.release = '1.13.6'
     self.base_url = 'https://nginx.org/en/docs/'
     self.links = {
       home: 'https://nginx.org/',