The macOS fsm-settings-darwin.c is applicable to other Unix variants
as well. Rename it to fsm-settings-unix.c, using the safer
xstrdup()+dirname() approach and including the "vfat" filesystem check.
Now that both fsm-ipc and fsm-settings use the "unix" variant name,
set FSMONITOR_OS_SETTINGS to "unix" for macOS in config.mak.uname and
remove the if/else conditionals from the build files.
Signed-off-by: Paul Tarjan <github@paulisageek.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
0e210668c7