PROTON-2131: Improved documentation of logger API
PROTON-2131: Improved documentation of logger API

ChugR/qpid-proton,apache/qpid-proton,ssorj/qpid-proton,astitcher/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,ChugR/qpid-proton,astitcher/qpid-proton,astitcher/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,apache/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,ssorj/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,ChugR/qpid-proton,ssorj/qpid-proton,gemmellr/qpid-proton,ChugR/qpid-proton,kgiusti/qpid-proton,gemmellr/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,kgiusti/qpid-proton,astitcher/qpid-proton