In BRL output display empty lines at the bottom of the page

[bertfrees]

Mischa says

pFIRST PAGE
 BLA BLA



pSECOND PAGE

is preferred over

pFIRST PAGE
 BLA BLA
pSECOND PAGE

because although it doesn't make a difference for the embosser, it gives a better overview of the page to the transcribers and the person responsible for the final check.

See also #22 (comment).