HEADS UP package "fetchmail" vulnerable and 6.4.0 release candidate out

[Matthias Andree <matthias.andree@gmx.de>]

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Corinna, and everyone else who is interested,

checking <https://cygwin.com/packages/summary/fetchmail.html>,
I see that Cygwin packages a very old fetchmail version that has unfixed
security vulnerabilities and unfixed critical (data loss) bugs.

Constructively moving forward, please:

1. I am about to release 6.4.0 in a few weeks' time with a few important
SSL/TLS/OpenSSL updates that permit newer OpenSSL versions, require
OpenSSL v1.0.2, and practically permit TLS v1.3 if linked against a
sufficiently new OpenSSL.
We're shy of 200 commits since the last formal release 6.3.26, and 276
changes past 6.3.21, the younger x86 (32bit) package for Cygwin.
High-level details in the NEWS file linked below. Care was taken to not
break the interfaces too hard, but in the sense of security, I carefully
changed --sslproto semantics and flipped the switch

2. Note that fetchmail has seen several SECURITY and CRITICAL bug fixes
since 6.3.21/6.3.22.
Review <https://gitlab.com/fetchmail/fetchmail/blob/legacy_64/NEWS> for
details, and look for these two capitalized words.

3. Please try to package 6.4.0.rc2 for x86 and x86_64 against Cygwin's
libssl1.1, and see if you find any portability issues that would require
fixing before 6.4.0. Deadline end of August 2019, and unless really
needed for non-trivial code changes, rc2 is also the planned final
candidate.

Source tarballs and detached ASCII-armored GnuPG signatures at
<https://sourceforge.net/projects/fetchmail/files/branch_6.4/>.

Thanks for your consideration.

Regards,
Matthias Andree - upstream fetchmail maintainer

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