Add support for boolean attributes
Add support for boolean attributes

Normalize likely textual input to a boolean, but otherwise treat such
data in the same manner as a string.

xcat2/confluent,jjohnson42/confluent,whowutwut/confluent,xcat2/confluent,xcat2/confluent,whowutwut/confluent,xcat2/confluent,whowutwut/confluent,jjohnson42/confluent,whowutwut/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,jjohnson42/confluent