Bug#989338: debian-edu-config: sending system emails from machines inside internal network broken

[Wolfgang Schweer <w.schweer@gmx.de>]

Package: debian-edu-config
Version: 2.11.55
Severity: important

During a recent upgrade test I noticed that sending system emails from machines
inside the internal network is no longer working. This seems to be due to
changes in src:exim4 4.94.

Client system are configured using preseeding, but this setup is failing now.
Using the (already shipped, but unsused) exim-ldap-client-v4.conf file as
exim4.conf on client machines re-enables sending system emails.

The fix is simple:

diff --git a/cf3/cf.exim b/cf3/cf.exim
index 904f94df..3dff1ea0 100644
--- a/cf3/cf.exim
+++ b/cf3/cf.exim
@@ -10,6 +10,12 @@ files:
       move_obstructions => "true";
     "/etc/default/exim4"
       edit_line => exim_default;
+
+  debian.!server.(workstation|minimal).installation::
+
+    "/etc/exim4/exim4.conf"
+      link_from => ln_s("/etc/exim4/exim-ldap-client-v4.conf"),
+      move_obstructions => "true";
 }

 bundle edit_line exim_default