Add zmq_reconnect_ivl options for fedmsg.

This should reduce CPU load on some of our machines, like pkgs01.

roles/fedmsg/base/templates/base.py.j2

@@ -63,6 +63,12 @@ config = dict(
     zmq_tcp_keepalive_cnt=3,
     zmq_tcp_keepalive_idle=60,
     zmq_tcp_keepalive_intvl=5,
+
+    # See the following
+    #   - https://github.com/fedora-infra/fedmsg/issues/305
+    #   - http://api.zeromq.org/3-2:zmq-setsockopt
+    zmq_reconnect_ivl=100,
+    zmq_reconnect_ivl_max=1000,
 )
 
 # This option adds an IPC socket by which we can monitor hub health.