Gitblit api links in the online documentation dont work

Originally reported on Google Code with ID 449

```
Links like http://code.google.com/p/gitblit/downloads/detail?name=%API% and http://code.google.com/p/gitblit/downloads/detail?name=%MANAGER%
do not work. These links can be found on the home page (gitblit.com) and in gitblit.com/rpc.html

```

Reported by `ron.smits@salvesdevelopment.nl` on 2014-06-19 06:51:08
