Merge branch 'wiki-fix' into 'master'

Use the proper GitLab URL for links in Wiki

Fixes gitlab-org/gitlab-ce#17071

wiki links are proper compiled, e.g.
```
[same-level](same-level) -> <a href="same-level">same-level</a>
[sub-level](sub/level) -> <a href="sub/level">sub-level</a>
[upper-level](../upper-level) -> <a href="../upper-level">upper-level</a>
```

See merge request !4026

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/gitlab/url_builder.rb b/lib/gitlab/url_builder.rb
index 2bbbd3074e8..67a09d5abf5 100644
--- a/lib/gitlab/url_builder.rb
+++ b/lib/gitlab/url_builder.rb
@@ -62,7 +62,7 @@ module Gitlab
     end
 
     def wiki_page_url
-      "#{Gitlab.config.gitlab.url}#{object.wiki.wiki_base_path}/#{object.slug}"
+      "#{object.wiki.wiki_base_path}/#{object.slug}"
     end
   end
 end