fetcher: better handling non-string body
fetcher: better handling non-string body

SNASW/rendr,0111001101111010/rendr,alexindigo/rendr,bigethan/rendr,eGood/rendr0.5,yhagio/rendr,is00hcw/rendr,modulexcite/rendr,CristinaFoltea/rendr,rendrjs/rendr,kball/rendr,sarchila/rendr