rust-filepatterns: remove bridge code for filepatterns-related functions These functions will be used internally by `hg-core` without needed to be exposed to Python. Differential Revision: https://phab.mercurial-scm.org/D7868

rust-utils: add Rust implementation of Python's "os.path.splitdrive" I also wrote the NT version although I didn't mean to at first, so I thought I would keep it, so that any further effort to get the Rust code working on Windows is a little easier. Differential Revision: https://phab.mercurial-scm.org/D7864

setup: link osutil.so to libsocket on Solaris/illumos (issue6299)

discovery: avoid wrongly saying there are nothing to pull We can get in a situation where a revision passed through `hg pull --rev REV` are available on the server, but not a descendant of the advertised server heads. For example the server could lying be during heads advertisement, to hide some pull request. Or obsolete/hidden content could be explicitly pulled. So in this case the lookup associated to `REV` returned successfully, but the normal discovery will find all advertised heads already known locally. This flip a special boolean `anyinc` that will prevent any fetch attempt, preventing `REV` to be pulled over. We add three line of code to detect this case and make sure a pull actually happens. My main target is to make some third party extensions happy (I expect the associated test to move upstream with the extension). However this fix already make some of the `infinitepush` test happier.