Merge branch 'ps/run-auto-maintenance-in-receive-pack'

The "receive-pack" program (which responds to "git push") was not converted to run "git maintenance --auto" when other codepaths that used to run "git gc --auto" were updated, which has been corrected. * ps/run-auto-maintenance-in-receive-pack: builtin/receive-pack: convert to use git-maintenance(1) run-command: introduce function to prepare auto-maintenance process