Gitlab CI: optional SSL certificate validation

gitlab_ssl_verify.patch

--- a/app/models/network.rb
+++ b/app/models/network.rb
@@ -7,6 +7,7 @@ class Network
     opts = {
       body: api_opts.to_json,
       headers: {"Content-Type" => "application/json"},
+      verify: verify?
     }

     endpoint = File.join(url, API_PREFIX, 'session.json')
@@ -23,6 +24,7 @@ class Network
     opts = {
       query: api_opts,
       headers: {"Content-Type" => "application/json"},
+      verify: verify?
     }

     endpoint = File.join(url, API_PREFIX, 'user.json')
@@ -109,4 +111,10 @@ class Network
       nil
     end
   end
+
+  protected
+
+  def verify?
+    GitlabCi.config[:verify_ssl] || true
+  end
 end