This time fixing a segfault reported & debugged entirely by graywolf.
See: <https://github.com/OpenSMTPD/OpenSMTPD/issues/1233>
So, what went wrong here? Mostly me being entirely convinced, to the
point of not even looking, that we have no opensmtpd system test. We
do. Instead, I tested the update on my own mail server, which for
entirely unhysterical raisins happens to link OpenSMTPd against OpenSSL
and so just happens to sidestep this bug. Aiya.
* gnu/packages/mail.scm (opensmtpd): Update to 7.4.0p0.
[native-inputs]: Add pkg-config.
[inputs]: Add libbsd.
[arguments]: Add "--with-libbsd" to #:configure-flags.
Co-authored-by: graywolf in #guix
Change-Id: I5536b828eecd16f041ed9381b16bd7aa54158155