infra: buildbot master configs and slave systemd service file
* master: master.cfg and example pass.cfg file
* worker: systemd service unit file.
Setting up a slave/worker is trivial:
su - buildbot
buildslave create-slave . radia.quagga.net buildbot-<name> <password>
diff --git a/infra/buildbot/worker/buildbot-slave.service b/infra/buildbot/worker/buildbot-slave.service
new file mode 100644
index 0000000..dcb136f
--- /dev/null
+++ b/infra/buildbot/worker/buildbot-slave.service
@@ -0,0 +1,13 @@
+[Unit]
+Description=Buildbot slave Daemon
+
+[Service]
+WorkingDirectory=/home/buildbot
+User=buildbot
+Group=buildbot
+ExecStart=/usr/bin/buildslave start --nodaemon
+ExecStop=/usr/bin/buildslave stop
+ExecReload=/usr/bin/buildslave reconfig
+
+[Install]
+WantedBy=multi-user.target