LOG: Fixes in level display filter and unknown log level string.
LOG: Fixes in level display filter and unknown log level string.

cedar-renjun/LibSWD,cedar-renjun/LibSWD,ongjohn/LibSWD,ongjohn/LibSWD,shangdawei/LibSWD,cedar-renjun/LibSWD,shangdawei/LibSWD,shangdawei/LibSWD,ongjohn/LibSWD