windows: add a global equivalent to /etc/mercurial for *.rc processing
This follows the Unix model of processing this directory immediately after
<internal>/*.rc, and prior to the installation relative files. Since the Unix
processing supports both a directory and a file (the former overriding the
latter), and since %HOME% supports both `*.ini` and `.hgrc` (again, the former
overriding the latter), this does too. The Unix file doesn't have a `.` prefix,
so it's not used here either.
Note that this is the opposite order of processing the exe relative paths. But
since it's in agreement with Unix, %HOME% and %USERPROFILE%, it seems reasonable
to ignore that. Maybe we can change that and take a BC, because that's
something the installer should be controlling, and I can't imagine people having
both paths *and* conflicting settings.
Differential Revision: https://phab.mercurial-scm.org/D7692
https://bz.mercurial-scm.org/612
$ hg init
$ mkdir src
$ echo a > src/a.c
$ hg ci -Ama
adding src/a.c
$ hg mv src source
moving src/a.c to source/a.c
$ hg ci -Ammove
$ hg co -C 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo new > src/a.c
$ echo compiled > src/a.o
$ hg ci -mupdate
created new head
$ hg status
? src/a.o
$ hg merge
merging src/a.c and source/a.c to source/a.c
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg status
M source/a.c
R src/a.c
? src/a.o