This reverts commit 7868577c.

* white space between names and keys
* added tv2 keys and board 21/22 keys
* empty board key files are ignored now
* fixed description for board keys
* added Freimann to Studentstadt in Impressum

* Fingerprint: new front matter variable to define fingerprints for both
personal and member keys
* Redirects: Added redirects for empty folger pages such as
/de/keys/board

* list of all board keys sorted by date, downloadable
* optional keys from board members which are shown and downloadable if
* before expiery date
* if the exists
* if they file has content i.e. includes a key