Adapt data security statement

[ChristophEwertowski]

We have to link to data security statements for our sites.

[fsteeg]

Deployed to test:

• [x] Lobid 2.x: http://stage.lobid.org (footer)
• [x] Lobid 1.x http://stage.lobid.org/api (footer)
• [x] NWBib http://test.nwbib.de (i-menu, header)
• [x] Digitalisiertedrucke http://test.digitalisiertedrucke.de (header)

[acka47]

+1

[ChristophEwertowski]

The links in resources/organisations/gnd are missing therefore opening this issue again.

[fsteeg]

Deployed to production, closing. See:

http://lobid.org/resources http://lobid.org/organisations http://lobid.org/gnd