Add number of subs to message to template

Add number of subs to message and added var that set level.

Need this db update:
INSERT INTO vars (name, value, description) VALUES
('subs_level','15','Level at which to not to display low submissions
message, set to 0 to diable message');
Updates to add subs_level var.

add subs_level to var table in database scripts
Spelling mistake
Add ability to disable moderate/posting restriction globally

Signed-off-by: Michael Casadevall <mcasadevall@ubuntu.com>