The runtime filters (both aggregated and per-backend) are all getting
initialized to the default level CONFIG_LOG_DEFAULT_LEVEL. This is not
correct behavior: the initial runtime setting for each source ID
should match its compile-time level setting.
Otherwise, setting CONFIG_LOG_RUNTIME_FILTERING=y changes the logging
behavior for messages that pass the compile time filter check, but not
the runtime check (this currently happens when LOG_LEVEL=4, since
CONFIG_LOG_DEFAULT_LEVEL=3).
Fix this by initializing all filters to their module's compile time
settings. Also make sure that filters are set up before backends are
activated, to avoid race conditions.
Fix a stray documentation typo while we are here.
Signed-off-by: Marti Bolivar <marti@foundries.io>
55327a183d