--on-variable handlers in functions/ are only autoloaded on explicit call,
so they never fire when a universal variable changes. Moving the definitions
to conf.d/logging-events.fish ensures they are registered at shell init.
Also adds a startup __fish_config_sync_logging call so pre-set variable
values (e.g. set before this shell was opened) take effect immediately
without requiring a re-set.
rootiest
76349ad94b
