Revision 26748: MQTT2_SERVER: default for respectRetain is featurelevel
MQTT2_SERVER: default for respectRetain is featurelevel <= 6.1 (Forum: #130511)
Source: Revision 26748: MQTT2_SERVER: default for respectRetain is featurelevel (http://svn.fhem.de/trac/changeset/26748/trunk)