Bug#893199: O: rapidjson -- fast JSON parser/generator for C++ with SAX/DOM style API

[Shengjing Zhu]

Control: retitle -1 ITA: rapidjson -- fast JSON parser/generator for
C++ with SAX/DOM style API
Control: owner -1 !

I intent to adopt this package. I'm preparing the new version of ceph,
which needs this library.

Thanks!