Log Message:
Update to 2.11.0.0. From the changelog:

- Adaptation to skalibs-2.11.0.0.
- Bugfixes.
- s6-svwait now supports -r and -R options to wait for restarts.
- New service directory file: lock-fd, to take a lock before
  starting a service, protecting against concurrent instances.
- s6/lock.h, s6/supervise.h, s6/fdholder.h: simpler header names
- s6-ioconnect bugfix; does not support zero-copy anymore.
- New binaries: s6-svlink, s6-svunlink. The former is a rewrite of
  smarden.org's socklog program, in order to implement a fully
  functional syslogd with only s6 programs. The latter are tools that
  start and stop services by symlinking/unlinking service directories
  from a scan directory, in order to make it easier to integrate
  s6-style services in boot scripts for sequential service managers such
  as OpenRC.