Bug 15745: C4::Matcher gets CCL parsing error if term contains ? (question mark)

 Bug 15745: C4::Matcher gets CCL parsing error if term contains ? (question mark)

Signed-off-by: Olli-Antti Kivilahti <olli-antti.kivilahti@jns.fi>
Also fixes ! and +
Rebased to master
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
It makes perfect sense and works as expected. This part of the code is too
under-tested so no point requiring a regression test for such a simple change.

Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>