merge newer from self-hosted

Author: petecooper

_includes/header.html

@@ -12,7 +12,7 @@ <h1 class="masthead" itemprop="name"><a rel="home" itemprop="url" href="https://
         {% if page.layout != "default" and page.layout != "search" %}
         <div itemscope itemtype="https://schema.org/WebSite">
             <meta itemprop="url" content="https://docs.textpattern.com/">
-            <form class="search-form" role="search" action="https://docs.textpattern.com/search" itemprop="potentialAction" itemscope itemtype="https://schema.org/SearchAction" data-search-form>
+            <form class="search-form" role="search" action="/search" itemprop="potentialAction" itemscope itemtype="https://schema.org/SearchAction" data-search-form>
                 <meta itemprop="target" content="https://docs.textpattern.com/search/?q={q}">
                 <label class="accessibility" for="q">Search</label>
                 <input id="q" name="q" type="search" size="32" placeholder="Search documentation…" itemprop="query-input" data-search-input>