rust-update: make `update_from_null` respect `worker.numcpu` config option
This was overlooked in the original series.
This is important for tests (because we run many at once), and for the
occasional end user that wants to keep their CPU usage in check.
A future series should clean up this `worker` parameter tunelling business by
rewriting the config in Rust, but doing so on stable would be a very bad
idea.
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install::
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing::
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.
Notes for packagers
===================
Mercurial ships a copy of the python-zstandard sources. This is used to
provide support for zstd compression and decompression functionality. The
module is not intended to be replaced by the plain python-zstandard nor
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to diagnose errors and are explicitly discouraged as unsupported
configuration.