vendor: github.com/Zillode/notify is now github.com/syncthing/notify (#4813)

Given that we've taken on the resposibility of maintaining this forked
package I've added it to the Syncthing organization. We still vendor it
like an external package, because it's convenient to keep it as a fork
of upstream to easier merge and file pull requests towards them.

vendor/github.com/syncthing/notify/event_kqueue.go

@@ -0,0 +1,59 @@
+// Copyright (c) 2014-2015 The Notify Authors. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+// +build darwin,kqueue dragonfly freebsd netbsd openbsd
+
+package notify
+
+import "syscall"
+
+// TODO(pblaszczyk): ensure in runtime notify built-in event values do not
+// overlap with platform-defined ones.
+
+// Platform independent event values.
+const (
+	osSpecificCreate Event = 0x0100 << iota
+	osSpecificRemove
+	osSpecificWrite
+	osSpecificRename
+	// internal
+	// recursive is used to distinguish recursive eventsets from non-recursive ones
+	recursive
+	// omit is used for dispatching internal events; only those events are sent
+	// for which both the event and the watchpoint has omit in theirs event sets.
+	omit
+)
+
+const (
+	// NoteDelete is an event reported when the unlink() system call was called
+	// on the file referenced by the descriptor.
+	NoteDelete = Event(syscall.NOTE_DELETE)
+	// NoteWrite is an event reported when a write occurred on the file
+	// referenced by the descriptor.
+	NoteWrite = Event(syscall.NOTE_WRITE)
+	// NoteExtend is an event reported when the file referenced by the
+	// descriptor was extended.
+	NoteExtend = Event(syscall.NOTE_EXTEND)
+	// NoteAttrib is an event reported when the file referenced
+	// by the descriptor had its attributes changed.
+	NoteAttrib = Event(syscall.NOTE_ATTRIB)
+	// NoteLink is an event reported when the link count on the file changed.
+	NoteLink = Event(syscall.NOTE_LINK)
+	// NoteRename is an event reported when the file referenced
+	// by the descriptor was renamed.
+	NoteRename = Event(syscall.NOTE_RENAME)
+	// NoteRevoke is an event reported when access to the file was revoked via
+	// revoke(2) or	the underlying file system was unmounted.
+	NoteRevoke = Event(syscall.NOTE_REVOKE)
+)
+
+var osestr = map[Event]string{
+	NoteDelete: "notify.NoteDelete",
+	NoteWrite:  "notify.NoteWrite",
+	NoteExtend: "notify.NoteExtend",
+	NoteAttrib: "notify.NoteAttrib",
+	NoteLink:   "notify.NoteLink",
+	NoteRename: "notify.NoteRename",
+	NoteRevoke: "notify.NoteRevoke",
+}