Initial QSfera import

Server/vendor/github.com/nats-io/nats-server/v2/internal/fastrand/LICENSE

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+Copyright (c) 2011 The LevelDB-Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Server/vendor/github.com/nats-io/nats-server/v2/internal/fastrand/fastrand.go

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+// Copyright 2020-2023 The LevelDB-Go, Pebble and NATS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+
+package fastrand
+
+import _ "unsafe" // required by go:linkname
+
+// Uint32 returns a lock free uint32 value.
+//
+//go:linkname Uint32 runtime.fastrand
+func Uint32() uint32
+
+// Uint32n returns a lock free uint32 value in the interval [0, n).
+//
+//go:linkname Uint32n runtime.fastrandn
+func Uint32n(n uint32) uint32
+
+// Uint64 returns a lock free uint64 value.
+func Uint64() uint64 {
+	v := uint64(Uint32())
+	return v<<32 | uint64(Uint32())
+}