- Update to 6.4.1 [bsc#1152964]
## REGRESSION FIXES:
* The bug fix Debian Bug#941129 was incomplete and caused
- a regression in the default file locations, so that fetchmail was
no longer able to find its configuration files in some situations.
- a regression under _FORTIFY_SOURCE where PATH_MAX > minimal _POSIX_PATH_MAX.
- Update to 6.4.0
## SECURITY FIXES THAT AFFECT BEHAVIOUR AND MAY REQUIRE RECONFIGURATION
* Fetchmail no longer supports SSLv2.
* Fetchmail no longer attempts to negotiate SSLv3 by default,
even with --sslproto ssl23. Fetchmail can now use SSLv3, or TLSv1.1 or a newer
TLS version, with STLS/STARTTLS (it would previously force TLSv1.0 with
STARTTLS). If the OpenSSL version used at build and run-time supports these
versions, --sslproto ssl3 and --sslproto ssl3+ can be used to re-enable SSLv3.
Doing so is discouraged because the SSLv3 protocol is broken.
While this change is supposed to be compatible with common configurations,
users may have to and are advised to change all explicit --sslproto ssl2
(change to newer protocols required), --sslproto ssl3, --sslproto tls1 to
--sslproto auto, so that they can benefit from TLSv1.1 and TLSv1.2 where
supported by the server.
The --sslproto option now understands the values auto, ssl3+, tls1+, tls1.1,
tls1.1+, tls1.2, tls1.2+, tls1.3, tls1.3+ (case insensitively), see CHANGES
below for details.
* Fetchmail defaults to --sslcertck behaviour. A new option --nosslcertck to
override this has been added, but may be removed in future fetchmail versions
in favour of another configuration option that makes the insecurity in using
this option clearer.
## SECURITY FIXES
* Fetchmail prevents buffer overruns in GSSAPI authentication with user names
beyond c. 6000 characters in length. Reported by Greg Hudson.