* npm: Upgrade to 1.1.66 (isaacs)

* linux: use /proc/cpuinfo for CPU frequency (Ben Noordhuis)

* windows: map WSAESHUTDOWN to UV_EPIPE (Ben Noordhuis)

* windows: map ERROR_GEN_FAILURE to UV_EIO (Bert Belder)

* unix: do not set environ unless one is provided (Charlie McConnell)

* domains: don't crash if domain is set to null (Bert Belder)

* windows: fix the x64 debug build (Bert Belder)

* net, tls: fix connect() resource leak (Ben Noordhuis)