Bug#818897: Exim4 change CWD string to /

[Roman Bulakh]

Package: exim4
Version: 4.80-7+deb7u2

After updates exim to version 4.80-7+deb7u2 exim.c change CWD dir to /
on startup.

Checking cwd=/some/vay was a popular heuristic for
identifying the source of malware sending email.

The output would look something like this:

2016-03-04 11:46:22 cwd=/root 9 args: /usr/sbin/sendmail -FCronDaemon
-i -odi -oem -oi -t -f root

Now it looks like this:

2016-03-04 11:46:22 cwd=/ 9 args: /usr/sbin/sendmail -FCronDaemon -i
-odi -oem -oi -t -f root