roles/burp-server: Deploy BURP server

The *burp-server* role installs and configures a BURP server. It is
adapted from a previous iteration, and should support CentOS/RHEL/Fedora
and Gentoo, as well as both BURP 1.x and 2.x (depending on which version
gets installed by the system package manager).

To manage the certificate authority, the *burp-server* role uses the
`burp_ca` command. This has the advantage of not requiring any external
certificate management, but effectively binds the CA to a specific
machine.

roles/burp-server/library/burp_version

@@ -0,0 +1,23 @@
+# vim: set ft=python :
+
+def main():
+    module = AnsibleModule(
+        argument_spec={},
+        supports_check_mode=True,
+    )
+
+    burp = module.get_bin_path('burp', required=True)
+    rc, out, err = module.run_command([burp, '-v'], check_rc=True)
+    burp_version = out.strip().split('-')[1]
+
+    module.exit_json(
+        ansible_facts={
+            'burp_version': burp_version,
+        }
+    )
+
+
+from ansible.module_utils.basic import *
+
+if __name__ == '__main__':
+    main()