Clarify select.kqueue and select.kevent also available on macOS #143293
Description
The document says kqueue() and kevent() are only supported on BSD, but macOS also fully supports them:
cpython/Doc/library/select.rst
Line 103 in 7e3a5a7
cpython/Doc/library/select.rst
Line 114 in 7e3a5a7
While macOS uses a userland from BSD (FreeBSD in these days I guess?), our documentation consistently treats macOS as a distinct platform from BSD, for example:
cpython/Doc/library/socket.rst
Line 651 in 7e3a5a7