List of changes between 2.11.3.2 and 2.12.0.4 mentioned in the ./NEWS file:
In 2.21.0.1 - 2.12.0.4
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- Bugfixes.
In 2.12.0.0
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- New option to s6-svc: -s, to specify a signal by name (or number).
- New option to s6-log: -t, to specify a timeout for partial last lines.
- s6-svscan rewrite: no more quadratic reaps, no more forced 1s wait on shutdown
- Eliminated fork() wherever possible on systems supporting posix_spawn()
- Obsolete s6lockd subsystem removed.
PR: 279116