Fix documentation internal hyperlink

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16498 b56c7a7d-ac47-0410-a905-b6f7de78896a
(neilen, theuns) Improve logging of failed ?sensor-request requests

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16503 b56c7a7d-ac47-0410-a905-b6f7de78896a
(neilen, charles) Fix katcpv5 library Event strategy to not send updates if the sensor value has not changed

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16522 b56c7a7d-ac47-0410-a905-b6f7de78896a