merge 2and3 stubs for select (#1333)

There don't seem to be significant changes between Python 2 and 3. The Python 2
stub was much better, so I mostly built off of it.

stdlib/2and3/select.pyi

@@ -0,0 +1,137 @@
+import sys
+from typing import Any, Optional, Sequence, Tuple, Iterable, List, Union
+
+# When we have protocols, this should change to a protocol with a fileno method
+# See https://docs.python.org/3/c-api/file.html#c.PyObject_AsFileDescriptor
+_FileDescriptor = Union[int, Any]
+
+EPOLLERR: int
+EPOLLET: int
+EPOLLHUP: int
+EPOLLIN: int
+EPOLLMSG: int
+EPOLLONESHOT: int
+EPOLLOUT: int
+EPOLLPRI: int
+EPOLLRDBAND: int
+EPOLLRDNORM: int
+EPOLLWRBAND: int
+EPOLLWRNORM: int
+EPOLL_RDHUP: int
+KQ_EV_ADD: int
+KQ_EV_CLEAR: int
+KQ_EV_DELETE: int
+KQ_EV_DISABLE: int
+KQ_EV_ENABLE: int
+KQ_EV_EOF: int
+KQ_EV_ERROR: int
+KQ_EV_FLAG1: int
+KQ_EV_ONESHOT: int
+KQ_EV_SYSFLAGS: int
+KQ_FILTER_AIO: int
+KQ_FILTER_NETDEV: int
+KQ_FILTER_PROC: int
+KQ_FILTER_READ: int
+KQ_FILTER_SIGNAL: int
+KQ_FILTER_TIMER: int
+KQ_FILTER_VNODE: int
+KQ_FILTER_WRITE: int
+KQ_NOTE_ATTRIB: int
+KQ_NOTE_CHILD: int
+KQ_NOTE_DELETE: int
+KQ_NOTE_EXEC: int
+KQ_NOTE_EXIT: int
+KQ_NOTE_EXTEND: int
+KQ_NOTE_FORK: int
+KQ_NOTE_LINK: int
+KQ_NOTE_LINKDOWN: int
+KQ_NOTE_LINKINV: int
+KQ_NOTE_LINKUP: int
+KQ_NOTE_LOWAT: int
+KQ_NOTE_PCTRLMASK: int
+KQ_NOTE_PDATAMASK: int
+KQ_NOTE_RENAME: int
+KQ_NOTE_REVOKE: int
+KQ_NOTE_TRACK: int
+KQ_NOTE_TRACKERR: int
+KQ_NOTE_WRITE: int
+PIPE_BUF: int
+POLLERR: int
+POLLHUP: int
+POLLIN: int
+POLLMSG: int
+POLLNVAL: int
+POLLOUT: int
+POLLPRI: int
+POLLRDBAND: int
+POLLRDNORM: int
+POLLWRBAND: int
+POLLWRNORM: int
+
+class poll:
+    def __init__(self) -> None: ...
+    def register(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
+    def modify(self, fd: _FileDescriptor, eventmask: int) -> None: ...
+    def unregister(self, fd: _FileDescriptor) -> None: ...
+    def poll(self, timeout: Optional[float] = ...) -> List[Tuple[int, int]]: ...
+
+def select(rlist: Sequence[Any], wlist: Sequence[Any], xlist: Sequence[Any],
+           timeout: Optional[float] = ...) -> Tuple[List[Any],
+                                                    List[Any],
+                                                    List[Any]]: ...
+
+if sys.version_info >= (3, 3):
+    error = OSError
+else:
+    class error(Exception): ...
+
+# BSD only
+class kevent(object):
+    data: Any
+    fflags: int
+    filter: int
+    flags: int
+    ident: int
+    udata: Any
+    def __init__(self, ident: _FileDescriptor, filter: int = ..., flags: int = ..., fflags: int = ..., data: Any = ..., udata: Any = ...) -> None: ...
+
+# BSD only
+class kqueue(object):
+    closed: bool
+    def __init__(self) -> None: ...
+    def close(self) -> None: ...
+    def control(self, changelist: Optional[Iterable[kevent]], max_events: int, timeout: float = ...) -> List[kevent]: ...
+    def fileno(self) -> int: ...
+    @classmethod
+    def fromfd(cls, fd: _FileDescriptor) -> kqueue: ...
+
+# Linux only
+class epoll(object):
+    if sys.version_info >= (3, 3):
+        def __init__(self, sizehint: int = ..., flags: int = ...) -> None: ...
+    else:
+        def __init__(self, sizehint: int = ...) -> None: ...
+    if sys.version_info >= (3, 4):
+        def __enter__(self) -> epoll: ...
+        def __exit__(self, *args: Any) -> None: ...
+    def close(self) -> None: ...
+    closed: bool
+    def fileno(self) -> int: ...
+    def register(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
+    def modify(self, fd: _FileDescriptor, eventmask: int) -> None: ...
+    def unregister(self, fd: _FileDescriptor) -> None: ...
+    def poll(self, timeout: float = ..., maxevents: int = ...) -> List[Tuple[int, int]]: ...
+    @classmethod
+    def fromfd(cls, fd: _FileDescriptor) -> epoll: ...
+
+if sys.version_info >= (3, 3):
+    # Solaris only
+    class devpoll:
+        if sys.version_info >= (3, 4):
+            def close(self) -> None: ...
+            closed: bool
+            def fileno(self) -> int: ...
+        def register(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
+        def modify(self, fd: _FileDescriptor, eventmask: int = ...) -> None: ...
+        def unregister(self, fd: _FileDescriptor) -> None: ...
+        def poll(self, timeout: Optional[float] = ...) -> List[Tuple[int, int]]: ...