Handle munin_allow and nagios_allow variables as arrays

munin/templates/munin-node.conf.erb

@@ -37,8 +37,9 @@ host_name <%= @homename %>
 # regular expression, due to brain damage in Net::Server, which
 # doesn't understand CIDR-style network notation.  You may repeat
 # the allow line as many times as you'd like
-
-allow <%= @munin_allow %>
+<% @munin_allow.each do |allow| -%>
+allow <%= "^%s$" % allow.gsub('.', '\.') %>
+<% end -%>
 
 # Which address to bind to;
 host <%= @ipaddress %>