Martin von Zweigbergk <martinvonz@google.com> [Tue, 03 Nov 2020 09:56:02 -0800] rev 45843
config: read system hgrc in lexicographical order
This is similar to edbcf5b239f9 (config: read configs from directories
in lexicographical order, 2019-04-03). Apparently I forgot to sort the
system hgrc files there. That's fixed by this patch.
Differential Revision: https://phab.mercurial-scm.org/D9269