bug#26306: exim service patches (including mail-aliases-service-type)

[Ludovic Courtès]

BTW the tests pass but the log is a bit fishy:

--8<---------------cut here---------------start------------->8---
LOG: MAIN
  Warning: purging the environment.
 Suggested action: use keep_environment.
  408 LOG: MAIN
  408   exim 4.87_1 daemon started: pid=408, no queue runs, listening for SMTP 
on port 25 (IPv4)
  410 LOG: MAIN
  410   <= address@hidden H=(somehost) [10.0.2.2] P=esmtp S=225
  411 LOG: MAIN PANIC DIE
  411   re-exec of exim 
(/gnu/store/dph4aa2ql680y92rv1f0sg1h2218bnmm-exim-4.87.1/bin/exim) with -Mc 
failed: Permission denied
[   10.990230] exim[411]: segfault at 0 ip 00007f56dc8eb04d sp 00007fffb7145d78 
error 6 in libc-2.25.so[7f56dc867000+196000]
  410 LOG: smtp_connection MAIN
  410   SMTP connection from (somehost) [10.0.2.2] closed by QUIT
--8<---------------cut here---------------end--------------->8---

Do you also get this segfault and “MAIN PANIC DIE” thing?

Ludo’.