if bosh dns2 enabled, support hostname in hba.conf for replication [fixes #11] (#12)

Author: drnic

jobs/postgres/templates/config/hba.conf

@@ -10,9 +10,14 @@ local all all md5
 <% end %>
 
 # replication hosts
-<% link("db").instances.each do |instance|
-%>host replication replication <%= instance.address %>/32 trust
-<% end %>
+<%
+  link("db").instances.each do |instance|
+    if instance.address =~ /\b[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\b/
+-%>
+host replication replication <%= instance.address %>/32 trust
+<% else -%>
+host replication replication <%= instance.address %> trust
+<% end; end -%>
 
 # user-configured acls
 <% p("postgres.hba", []).each do |acl| %><%= acl %>