rhg: Initial repository locking Initial Rust implementation of locking based on the `.hg/wlock` symlink (or file), with lock breaking when the recorded pid and hostname show that a lock was left by a local process that is not running anymore (as it might have been killed). Differential Revision: https://phab.mercurial-scm.org/D11835

--- a/rust/hg-core/src/lib.rs	Mon Nov 29 17:37:08 2021 +0100
+++ b/rust/hg-core/src/lib.rs	Mon Mar 22 09:07:10 2021 +0100
@@ -29,6 +29,7 @@
 pub mod revlog;
 pub use revlog::*;
 pub mod config;
+pub mod lock;
 pub mod logging;
 pub mod operations;
 pub mod revset;