As said in the comment, the non-single-file mode could create way too many print
jobs, so enable this only for the CUPS backend, which has been modified
to send them as a single batch.

Conflicts:
	configure.ac
	include/vcl/printerinfomanager.hxx
	sw/source/uibase/dbui/dbmgr.cxx
	vcl/inc/cupsmgr.hxx
	vcl/unx/generic/printer/cupsmgr.cxx
	vcl/unx/generic/printer/printerinfomanager.cxx

Change-Id: I4c02ca0e8b91323b1d02f004c7b4813433064a11