debian/control.d/control.in: Whitespace cleanup

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian: Only recommend some of the modules

The syslog-ng meta-package now only depends on the Core
modules (anything that was part of syslog-ng before, or has been
depended on in 3.3), while the rest are recommended only. Eventually,
all modules will be moved to recommends.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>