Changes since version 1.20.2:
* win: add Windows XP support to uv_if_indextoname() (ssrlive)
* win: fix `'floor' undefined` compiler warning (ssrlive)
* win, pipe: stop read for overlapped pipe (Bartosz Sosnowski)
* build: fix utf-8 name of copyright holder (Jérémy Lal)
* zos: initialize pollfd revents (jBarz)
* zos,doc: add system V message queue note (jBarz)
* linux: don't use uv__nonblock_ioctl() on sparc (Ben Noordhuis)