stack/erp5: Make postfix happier.

Resolve warnings emitted by postfix commands themselves.

stack/erp5/buildout.hash.cfg

@@ -50,7 +50,7 @@ md5sum = f928b9dc99f7f970caadfe7dd6f95d34
 
 [template-postfix]
 filename = instance-postfix.cfg.in
-md5sum = 0b7db23344b4795c8786d5e655810b38
+md5sum = 88224e294b0361841614f4a31fc901c7
 
 [template-postfix-master-cf]
 filename = postfix_master.cf.in
@@ -58,7 +58,7 @@ md5sum = 9ac81647368068a1a98a785d08074b43
 
 [template-postfix-main-cf]
 filename = postfix_main.cf.in
-md5sum = 886d1b004049c8dc1f89cbbfe4f95371
+md5sum = f79ef8355c9f9950bc2cb17b52bc49fb
 
 [template-postfix-aliases]
 filename = postfix_aliases.in

stack/erp5/instance-postfix.cfg.in

@@ -163,6 +163,8 @@ context =
     key key smtpd-ssl:key
     key dh_512 smtpd-ssl:dh-512
     key dh_2048 smtpd-ssl:dh-2048
+    key postfix_location postfix-main-cf-parameter:postfix-location
+    key etc_postfix directory:etc-postfix
 
 [{{ section('postfix-master-cf') }}]
 < = jinja2-template-base

stack/erp5/postfix_main.cf.in

@@ -8,17 +8,19 @@ mail_owner = {{ mail_owner }}
 alias_maps = {{ aliases }}
 alias_database = {{ aliases }}
 mail_spool_directory = {{ spool_directory }}
-sendmail_path =
-newaliases_path =
-mailq_path =
+sendmail_path = {{ bin_directory }}/sendmail
+newaliases_path = {{ bin_directory }}/newaliases
+mailq_path = {{ bin_directory }}/mailq
 setgid_group = {{ setgid_group }}
-html_directory =
-manpage_directory =
-sample_directory =
-readme_directory =
+html_directory = no
+manpage_directory = {{ postfix_location }}/usr/local/man
+sample_directory = {{ postfix_location }}/etc/postfix
+readme_directory = no
 inet_interfaces = {{ inet_interfaces }}
 smtp_bind_address = 0.0.0.0
 smtp_bind_address6 = ::
+compatibility_level = 3.6
+smtputf8_enable = no
 
 # Compared to default:
 # - remove X-related variables, irrelevant for slapos, to be concise