fortress.pl: Fix missing config reference in the calls to logger()

fortress.pl: Make sure the global blocked_ref is not mistaken for the…

… local var

fortress.pl: Make sure we add all local IPs to the exclude list

We want to make sure that we detect all local IPs, not only localhost
and exclude them, to prevent accidental blocking of our own IPs.

I borrowed the get_local_ips() from my Hawk software.

Vesrsion bumped to 4.0

fortress-centos7.spec: fixed more build errors

fortressr.service and fortress-unblock were missing from the files section

fortress-centos7.spec: Fix build errors

* Removed non-existent paths. These were left from the hawk spec file, that was used a a template for this one.
* excludes are now copied direcly in /etc/fortress, instead of being a directory there.
* fixed proper pidfile location
* updated release version

TODO.md: first things