Improve "Subscribe" link in footer (jekyll#698)

Merge pull request 698

_includes/footer.html

@@ -6,7 +6,7 @@
     <div class="footer-col-wrapper">
       <div class="footer-col">
         <p class="feed-subscribe">
-          <a href="{{ 'feed.xml' | relative_url }}">
+          <a href="{{ site.feed.path | default: 'feed.xml' | absolute_url }}">
             <svg class="svg-icon orange">
               <use xlink:href="{{ 'assets/minima-social-icons.svg#rss' | relative_url }}"></use>
             </svg><span>Subscribe</span>

_includes/social-item.html

@@ -1,5 +1,5 @@
-<li>
-  <a rel="me" href="{{ entry.user_url }}" target="_blank" title="{{ entry.title | default: entry.platform }}">
+<li>{% assign entry = include.item %}
+  <a {% unless entry.platform == 'rss' %}rel="me" {% endunless %}href="{{ entry.user_url }}" target="_blank" title="{{ entry.title | default: entry.platform }}">
     <svg class="svg-icon grey">
       <use xlink:href="{{ '/assets/minima-social-icons.svg#' | append: entry.platform | relative_url }}"></use>
     </svg>

_includes/social.html

@@ -1,5 +1,5 @@
 <ul class="social-media-list">
 {%- for entry in site.minima.social_links -%}
-  {%- include social-item.html -%}
+  {%- include social-item.html item = entry -%}
 {%- endfor -%}
 </ul>

_includes/svg_symbol.html

@@ -0,0 +1,3 @@
+<symbol id="{{ include.key }}" fill-rule="evenodd" clip-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="1.414" viewBox="0 0 16 16">
+  {%- include social-icons/{{ include.key }}.svg -%}
+</symbol>

assets/minima-social-icons.liquid

@@ -0,0 +1,18 @@
+---
+permalink: /assets/minima-social-icons.svg
+---
+
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+{% comment %}
+  Iterate through {{ site.minima.social_links }} and render platform related SVG-symbol
+  unless the platform is "rss" because we need the "rss" symbol for the `Subscribe` link
+  in the footer and therefore inject the "rss" icon outside the iteration loop.
+{% endcomment %}
+{% for entry in site.minima.social_links %}
+  {%- assign symbol_id = entry.platform -%}
+  {%- unless symbol_id == "rss" -%}
+    {%- include svg_symbol.html key = symbol_id -%}
+  {% endunless %}
+{%- endfor -%}
+  {%- include svg_symbol.html key = "rss" -%}
+</svg>