roles/freeradius: Role to deploy RADIUS with EAP-TLS

The *freeradius* role is used to install and configure FreeRADIUS. The
configuration system for it is extremely complicated, with dozens of
files in several directories. The default configuration has a plethora
of options enabled that are not needed in most cases, so they are
disabled here. Since the initial (and perhaps only) use case I have for
RADIUS is WiFi authentication via certificates, only the EAP-TLS
mechanism is enabled currently.

roles/freeradius/handlers/main.yml

@@ -0,0 +1,6 @@
+- name: restart radiusd
+  service:
+    name=radiusd
+    state=restarted
+- name: save firewalld configuration
+  command: firewall-cmd --runtime-to-permanent