Backport upstream fix for OCaml 4 to avoid SIGSEGV
Unison 2.32.x consistently crashes on startup after reading its configuration
file with a SIGSEGV and does not serve its purpose at all.
Suggested by madpilot@ in https://reviews.freebsd.org/D26924#600631
While here, run the selftest as part of the build to catch such issues
in the future and receive pkg-fallout@ mail.
While here, also remove MAKE_JOBS_UNSAFE.
Bump PORTREVISION to trigger a rebuild and flush out the broken packages.
(The absence of bug reports however suggests that unison 2.32 is no longer
used or needed widely.)
Obtained from: Benjamin Pierce's upstream repo (madpilot@)
MFH: 2020Q4 (blanket, unbreak program, single patch)