Kodi doesn't set the CAPATH and CAINFO parameters for libcurl. To make HTTPS
connections work we can set them based on SSL_CERT_DIR and SSL_CERT_FILE.

--- a/xbmc/filesystem/CurlFile.cpp
+++ b/xbmc/filesystem/CurlFile.cpp
@@ -626,5 +626,9 @@
   if (!m_cipherlist.empty())
     g_curlInterface.easy_setopt(h, CURLOPT_SSL_CIPHER_LIST, m_cipherlist.c_str());
 
+  // Load certificate data from environment paths
+  g_curlInterface.easy_setopt(m_state->m_easyHandle, CURLOPT_CAPATH, getenv("SSL_CERT_DIR"));
+  g_curlInterface.easy_setopt(m_state->m_easyHandle, CURLOPT_CAINFO, getenv("SSL_CERT_FILE"));
+
   // enable HTTP2 support. default: CURL_HTTP_VERSION_1_1. Curl >= 7.62.0 defaults to CURL_HTTP_VERSION_2TLS
   g_curlInterface.easy_setopt(h, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
-
 }
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<tr><td><span title='2018-02-15 17:17:19 +0100'>2018-02-15</span></td><td><a href='/guix/commit/gnu/packages/augeas.scm?id=e0355894821b494c98b558cbf4239046a4e1f20a'>gnu: augeas: Update to 1.10.1.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2017-11-06 17:32:42 -0600'>2017-11-06</span></td><td><a href='/guix/commit/gnu/packages/augeas.scm?id=acc2dab7f2f50c9169d6388007c770878eae4a9c'>gnu: Disable gnulib's test-lock test in packages.</a><span class='msg-avail'>...</span></td><td>Eric Bavier</td></tr>
<tr><td><span title='2017-08-21 16:02:23 +0300'>2017-08-21</span></td><td><a href='/guix/commit/gnu/packages/augeas.scm?id=bd2e321061218729dec82fceba639aaee52bfff3'>gnu: augeas: Update to 1.8.1. Fixes CVE-2017-7555.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-05-06 11:19:45 +0200'>2017-05-06</span></td><td><a href='/guix/commit/gnu/packages/augeas.scm?id=2337067778c3057440e223076aa8263a87a633a1'>gnu: augeas: Update to 1.8.0.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>