Doxygen link is broken

[robe]

Paul,

I think when you were making logical structural changes to the docs layout, you broke the doxygen link.

​http://postgis.net/docs/doxygen/2.1

Please Fix. I really need it. The docs are still in the folder so I think its just your apache thing that messed it up.

I want my doxygen back

I'm okay if we need to give it a different path structure.

[pramsey]

Done