[exim] Exim 4.89.1 released

Exim maintainers, developers, users,

We have released a security release today.
The latest Exim release is now 4.89.1

This release contains all fixes we did on the exim-4_89+fixes branch
since the exim-4_89 release. This includes the fixes for
CVE-2017-16943 and CVE-2017-16944.

Tarballs are in the usual places (mirrors and
http://ftp.exim.org/pub/exim/exim4/), signed with my (Heiko
Schlittermann) signature.

Alternatively you can use Git from git://git.exim.org/, signed tag
exim-4_89_1.

As an alternative to installing this release you may prefer to disable
the SMTP chunking option by setting `chunking_advertise_hosts =`. This
would address the issues of the last two CVEs.

We expect the release of Exim 4.90 during the next weeks or so.

Thank you for using Exim, for your patience and help in debugging and
for your contributions.

PS: Please crosscheck the signature with public keyservers or and/or
https://https://ssl.schlittermann.de/keys/gpg/hs@schlittermann.de/F69376CE.asc)

    Best regards from Dresden/Germany
    Viele Grüße aus Dresden
    Heiko Schlittermann
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