cwclientlib #4508409 Add support for binary content [validation pending]

Add support for #4508408

prioritynormal
typeenhancement
done in0.2.0
load1.000
load left0.000
closed by#551d496c5648 [cwproxy.rqlio] allow to upload binary content (closes #4508409)
patch[cwproxy.rqlio] allow to upload binary content (closes #4508409) [applied]