Fix urls containing md

They trew a 403 Forbidden error because of the htaccess

F.E: http://recepten.dev/nl/recepten/salade-wrapper-met-hollandse-garnalen-en-sesamdressing

On the fork demo:
http://demo.fork-cms.com/en/md
http://demo.fork-cms.com/en/blog/detail/nunc-sediam-emd