Added link for connection configuration.

Linking to _Connections_ section of this page.
Completely agree with you. Was just following the rest of documentation. Most of it has `http://beta.sailsjs.org/` as a part of absolute path. Since that domain redirects to sailsjs.org, that's what I put.
Should links (with beta sub-domain) on all pages be changed to `/#/documentation...` instead of absolute path?