rust-chg: upgrade to futures-0.3 based libraries And do some trivial fixes: - BytesMut::put_u32_be() -> put_u32() - tokio_process -> tokio::process, CommandExt -> Command, spawn_async() -> spawn(), stdin() -> stdin - tokio_timer::sleep() -> tokio::time::delay_for() Differential Revision: https://phab.mercurial-scm.org/D8441

rust-chg: exclude futures-dependent modules from build and break things It's impractical to upgrade the codebase incrementally since futures 0.1 and 0.3 APIs are fundamentally different. So this patch temporarily excludes futures-dependent modules from the build. These modules will be upgraded and re-enabled one by one. Differential Revision: https://phab.mercurial-scm.org/D8440

tests: stabilize test-log.t on Windows I think this is because Windows doesn't recognize single quote. Other ssh based clones use this clunky style too. Differential Revision: https://phab.mercurial-scm.org/D8459

tests: stabilize test-convert-hg-source.t on Windows This was a missing update in 1b8fd4af3318. Differential Revision: https://phab.mercurial-scm.org/D8458

commit: tell user what to do with .hg/last-message.txt I have always assumed that the message will be reused by the next `hg commit`, but it seems it's just silently dropped on the next commit. Let's try to be more helpful by telling the user that they have to manually tell hg to reuse it. The file will still be lost if the user runs some other operation in between (like a non-in-memory rebase). That will be fixed once we've switched all operations to be in-memory :) I didn't include `$(hg root)/` in the path in the message to the user because that would have made the message too long. Hopefully the user will figure that part out themselves. Differential Revision: https://phab.mercurial-scm.org/D8463

test-check-rust-format: specify --edition=2018 rustfmt doesn't read Cargo.toml unless it's executed by cargo. https://github.com/rust-lang/rustfmt#rusts-editions

Added signature for changeset 26ce8e751503

Added tag 5.4rc0 for changeset 26ce8e751503

merge default into stable for 5.4 release

templatekw: fix shownames() to check if namespace exists in repo (issue6301) Namespace registration is dynamic, but the corresponding template keyword is registered statically.