Various export layouts cause 404 errors

[Stephan Doerfel]

use the export page and try several of the layouts

E.g.

• http://www.biblicious.org/msofficexml/user/sdo?items=100
• http://www.biblicious.org/plain/user/sdo?items=100 (cvPageLayout)
• http://www.biblicious.org/apa_html/user/sdo?items=100

[Daniel Zoller]

fixing #2412

→ <<cset 0391c6b587bd>>