3.24.4

Changelog

b192404 Allow addressing changesets by branch (#461)
5036feb Alternative approach to keeping archives cached (#450)
588c7fa Automatic workspace discovery (#442)
2bd92df Check for branch duplicates after creating changeset specs (#448)
289e14c Dockerfile: split release and dev recipes (#457)
6291577 Fix "file not found" errors by fixing rendering of steps.files (#464)
05c3ebd Fix possible closed-channel-send panic (#444)
fea960b Handle ctx.Done() when waiting for steps to finish (#443)
e036554 Link to troubleshooting docs when src campaign apply|preview fails (#451)
8e15f6d Make 'reachedTimeout' check more resilient (#445)
225502c Only fetch archive of subdirectories in workspaces (#462)
a640e33 Pin golang Docker tag (#458)
5bd42cd Prepare CHANGELOG for 3.24.4
97354de Update alpine Docker tag to v3.13.1 (#447)
90266fd Update golang:1.15-alpine Docker digest to 276ef02 (#459)
7ab009f Update golang:1.15-alpine Docker digest to 86a9ac8 (#460)
846b38d Update sourcegraph/alpine Docker tag to v3.12 (#455)
2819afb campaigns: wrap the troubleshooting suggestion (#452)
4844011 output: hide the cursor when updating (#456)
c47c349 servegit: eval symlinks on root (#454)