stack/erp5: Fix ipv6 url of mariadb catalog

When use-ipv6 is enabled, make mariadb publish an url of the form:
  `mysql://user:password@[ipv6]:port/database`

instead of:
  `mysql://user:password@ipv6:port/database`

which results in the zope instances crashing during processing
due to urlparse.urlsplit failing to parse the url.

stack/erp5/buildout.hash.cfg

@@ -26,7 +26,7 @@ md5sum = d10b8e35b02b5391cf46bf0c7dbb1196
 
 [template-mariadb]
 filename = instance-mariadb.cfg.in
-md5sum = 93b2277185e4949a3d17be79d3710d2d
+md5sum = e22baff0637d2973585dff2561487be5
 
 [template-kumofs]
 filename = instance-kumofs.cfg.in

stack/erp5/instance-mariadb.cfg.in

@@ -13,8 +13,10 @@
 {% set port = slapparameter_dict['tcpv4-port'] %}
 {% if use_ipv6 -%}
 {%   set ip = (ipv6_set | list)[0] -%}
+{%   set ip_as_host = '[%s]' % ip -%}
 {% else -%}
 {%   set ip = (ipv4_set | list)[0] -%}
+{%   set ip_as_host = ip -%}
 {% endif -%}
 {% set dash = parameter_dict['dash-location'] ~ '/bin/dash' %}
 
@@ -25,9 +27,9 @@ recipe = slapos.cookbook:publish.serialised
 {% set publish_database_list = [] -%}
 {% for database in database_list -%}
 {%   if database.get('user') -%}
-{%     do publish_database_list.append("mysql://" ~ database['user'] ~ ":" ~ database['password'] ~ "@" ~ ip ~ ":" ~ port ~ "/" ~ database['name']) -%}
+{%     do publish_database_list.append("mysql://" ~ database['user'] ~ ":" ~ database['password'] ~ "@" ~ ip_as_host ~ ":" ~ port ~ "/" ~ database['name']) -%}
 {%   else -%}
-{%     do publish_database_list.append("mysql://" ~ ip ~ ":" ~ port ~ "/" ~ database['name']) -%}
+{%     do publish_database_list.append("mysql://" ~ ip_as_host ~ ":" ~ port ~ "/" ~ database['name']) -%}
 {%   endif -%}
 {% endfor -%}
 {{ dumps(publish_database_list) }}