Add torrent link to release page

Author: Sjors

_includes/download_release.html

@@ -0,0 +1,8 @@
+{% capture RELEASE %}{% for subver in page.release %}{{subver}}{% unless forloop.last %}.{% endunless %}{% endfor %}{% endcapture %}
+{% capture PATH_PREFIX %}/bin/bitcoin-core-{{RELEASE}}{% endcapture %}
+{% capture FILE_PREFIX %}bitcoin-{{RELEASE}}{% endcapture %}
+{% assign magnet=page.optional_magnetlink %}
+<https://bitcoincore.org{{ PATH_PREFIX }}/>
+
+<a href="https://bitcoincore.org{{ PATH_PREFIX }}/{{ FILE_PREFIX }}.torrent" class="dl">Download torrent</a>
+  {% if magnet %} <a href="{{ magnet | replace: '&', '\&amp;'}}" class="magnetlink" data-proofer-ignore></a>{% endif %}<br>

_releases/0.17.1.md

@@ -27,7 +27,7 @@ optional_magnetlink: "magnet:?xt=urn:btih:c56c87ccfaa8e6fbccc90d549121e61efd97cb
 {% githubify https://github.com/bitcoin/bitcoin %}
 Bitcoin Core version 0.17.1 is now available from:
 
-  <https://bitcoincore.org/bin/bitcoin-core-0.17.1/>
+{% include download_release.html %}
 
 This is a new minor version release, with various bugfixes
 and performance improvements, as well as updated translations.

_releases/0.18.1.md

@@ -27,7 +27,7 @@ optional_magnetlink: "magnet:?xt=urn:btih:c3ba0cfee3ef8413098ac5e81db08a2670e9da
 {% githubify https://github.com/bitcoin/bitcoin %}
 Bitcoin Core version 0.18.1 is now available from:
 
-  <https://bitcoincore.org/bin/bitcoin-core-0.18.1/>
+{% include download_release.html %}
 
 This is a new minor version release, including new features, various bug
 fixes and performance improvements, as well as updated translations.

_releases/0.19.0.1.md

@@ -30,7 +30,7 @@ optional_magnetlink: "magnet:?xt=urn:btih:436859e8dddf4d8bd22d9ecc826139b6749a9a
 
 Bitcoin Core version 0.19.0.1 is now available from:
 
-  <https://bitcoincore.org/bin/bitcoin-core-0.19.0.1/>
+{% include download_release.html %}
 
 This release includes new features, various bug fixes and performance
 improvements, as well as updated translations.

_sass/download.scss

@@ -122,7 +122,7 @@
         position:relative;
         top:4px;
 }
-.downloadbox .magnetlink{
+.magnetlink{
         display:inline-block;
         width:16px;
         height:16px;