Fix a false positive due to groff

\- is a hyphen in man pages. Allow it

Signed-off-by: Niels Thykier <niels@thykier.net>
Fix another false positive due to a redactional variant

Found in libnss-pgsql

Signed-off-by: Niels Thykier <niels@thykier.net>
Fix a false positive in maintain.texi

Maitain.texi and associated file aka html/maitain/section/ have a false positive due to an example.

Allow:
Following is an example of the license notice to use after the copyright line(s)
using all the features of the GFDL.
@smallexample
Permission is granted to copy, distribute and
...

Signed-off-by: Niels Thykier <niels@thykier.net>
Add false positive due to variant of formulation

Avoid a false positive

Signed-off-by: Niels Thykier <niels@thykier.net>