Switch to the build tool everyone loves to hate. The Makefile has
served us well over the years but it's been acquiring more and more
features that autotools gives us for free, like easy static+shared
library building, sane install targets, and so on.
This commit drops MinGW support. If there is demand for it, we'll
re-add it.
Based on UNIX sockets to avoid the vagaries of FIFOs
in asynchronous mode. Currently unlinks stale sockets
before binding and cleans them up again after shutdown.
Instead of uv_shutdown, uv_write, uv_connect taking raw uv_req_t we subclass
uv_req_t into uv_shutdown_t, uv_write_t, and uv_connect_t.
uv_req_init is removed.