fix hex conversion in json_send_qstring
fix hex conversion in json_send_qstring

it was sending \u0054 for \, which came out as 'T' in sxls.

michals/sx,michals/sx,gcsideal/sx-debian,michals/sx,gcsideal/sx-debian,gcsideal/sx-debian,michals/sx,gcsideal/sx-debian