Add support to configure webhook_timeout in gitlab.yaml

Created by: wesgurn

Our Gitlab instance needed the ability to increase the webhook_timeout used by HTTParty. It was hardcoded at 10 and I moved it to a gitlab.yaml file as a config variable

Webhook settings

webhook_timeout: 30 # default: 10 - Number of seconds to wait for HTTP response after sending webhook HTTP POST request

app/views/devise/shared/_links.erb

@@ -2,7 +2,7 @@
   <%= link_to "Sign in", new_session_path(resource_name), class: "btn" %><br />
 <% end -%>
-<%- if devise_mapping.registerable? && controller_name != 'registrations' %>
+<%- if devise_mapping.registerable? && controller_name != 'registrations' && Gitlab.config.gitlab.signup_enabled %>
   <%= link_to "Sign up", new_registration_path(resource_name) %><br />
 <% end -%>