tests: extract the http server authentication extension to a single module We had 4 copy/pastes of this, and no coverage for http digests (which are currently broken on py3).

extdiff: support tools that can be run simultaneously

subrepo: avoid false unsafe path detection on Windows Subrepo paths are not normalized for the OS, so what was happening in the subsequent root path check was: root -> $TESTTMP\issue1852a\sub/repo util.expandpath(...) -> $TESTTMP\issue1852a\sub/repo os.path.realpath(...) -> $TESTTMP\issue1852a\sub\repo

largefiles: use wrappedfunction() in overriderevert() Differential Revision: https://phab.mercurial-scm.org/D5869

largefiles: use wrappedfunction() for "normal files match" in overridecopy() Differential Revision: https://phab.mercurial-scm.org/D5868

largefiles: use wrappedfunction() for match() override in overridecopy() This reduced the time that the override is in place, but I that it's correct this way (only for the duration of the orig() call). Differential Revision: https://phab.mercurial-scm.org/D5867

largefiles: use wrappedfunction() for util.copyfile() override Differential Revision: https://phab.mercurial-scm.org/D5866

largefiles: use wrappedfunction() for matchandpats() override in overridelog() Differential Revision: https://phab.mercurial-scm.org/D5865