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)