erp5: Exclude the whole postfix partition from resilience.

This partition contains no data worthy of backup:
- only in-transit emails appear
- logging is (sadly) not local to the partition

stack/erp5/buildout.hash.cfg

@@ -50,7 +50,7 @@ md5sum = dec33a617fa1b307c8ddb883efcfe3ce
 
 [template-postfix]
 filename = instance-postfix.cfg.in
-md5sum = 56169f1a69fd99713e0fdef8ee14d25c
+md5sum = b8c837cdf0cb1065cd52a2f77850a998
 
 [template-postfix-master-cf]
 filename = postfix_master.cf.in

stack/erp5/instance-postfix.cfg.in

@@ -63,7 +63,7 @@ var-spool-postfix-trace = ${:var-spool-postfix}/trace
 # Generate rdiff exclude file
 recipe = slapos.recipe.template:jinja2
 mode = 644
-template = {{ 'inline:{{ "${directory:log}/**\\n" }}' }}
+template = {{ 'inline:{{ "**\\n" }}' }}
 rendered = ${directory:srv}/exporter.exclude
 
 {% if divert -%}