If we update key types from core, and groups 2 - n have a canonical type but
the same symbols as the explicit type of group 1, assume that it was a core
sym duplication according to Section 12.4 of the XKB Protocol Spec.
Ignore the canonical types and pretend there's only one group for the key -
with the explicit key type.
The protocol spec does not cover this case, so we have to guess here.
The X server uses this directory to store the compiled version of the
current keymap and/or any scratch keymaps used by clients. The X server
or some other tool might destroy or replace the files in this directory,
so it is not a safe place to store compiled keymaps for long periods of
time. The default keymap for any server is usually stored in:
X<num>-default.xkm
where <num> is the display number of the server in question, which makes
it possible for several servers *on the same host* to share the same
directory.
Unless the X server is modified, sharing this directory between servers on
different hosts could cause problems.