rust-chg: leverage impl trait at argument position
Differential Revision: https://phab.mercurial-scm.org/D8401
setup: link osutil.so to libsocket on Solaris/illumos (
issue6299)
revset: import `unstable()` from the evolve extension
Differential Revision: https://phab.mercurial-scm.org/D8404
fastexport: make a diagnostics message more localizable
Differential Revision: https://phab.mercurial-scm.org/D8398
rust-chg: use "crate::" to import local modules
I feel it's easier to follow to resolve modules from the crate root than
relative path from self module.
Differential Revision: https://phab.mercurial-scm.org/D8400
rust-chg: upgrade to 2018 edition and remove useless extern crates
Differential Revision: https://phab.mercurial-scm.org/D8399