89_VCONTROL.pm: init_every_poll attrib, update_only_changes attrib, register conv Method
89_VCONTROL.pm: init_every_poll attrib, update_only_changes attrib, register conv MethodView Changes
Source: 89_VCONTROL.pm: init_every_poll attrib, update_only_changes attrib, register conv Method (http://sourceforge.net/p/fhem/code/8021/)