Re-license several more files under MPL-2.0

- Several files where @MCJack123 is the exclusive contributor. He has
   signed over all contributions to "any OSI-approved license". Thank
   you!

 - Various the file handle classes: Looking at these again, I don't
   think they contain any of the original code.

projects/core/src/main/java/dan200/computercraft/core/apis/handles/BinaryReadableHandle.java

@@ -1,6 +1,6 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+// SPDX-FileCopyrightText: 2018 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0
 
 package dan200.computercraft.core.apis.handles;
 

projects/core/src/main/java/dan200/computercraft/core/apis/handles/BinaryWritableHandle.java

@@ -1,6 +1,6 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+// SPDX-FileCopyrightText: 2017 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0
 
 package dan200.computercraft.core.apis.handles;
 

projects/core/src/main/java/dan200/computercraft/core/apis/handles/EncodedReadableHandle.java

@@ -1,6 +1,6 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+// SPDX-FileCopyrightText: 2018 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0
 
 package dan200.computercraft.core.apis.handles;
 

projects/core/src/main/java/dan200/computercraft/core/apis/handles/EncodedWritableHandle.java

@@ -1,6 +1,6 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+// SPDX-FileCopyrightText: 2017 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0
 
 package dan200.computercraft.core.apis.handles;
 

projects/core/src/main/java/dan200/computercraft/core/apis/handles/HandleGeneric.java

@@ -1,6 +1,6 @@
-// Copyright Daniel Ratcliffe, 2011-2022. Do not distribute without permission.
+// SPDX-FileCopyrightText: 2017 The CC: Tweaked Developers
 //
-// SPDX-License-Identifier: LicenseRef-CCPL
+// SPDX-License-Identifier: MPL-2.0
 
 package dan200.computercraft.core.apis.handles;
 

projects/core/src/main/resources/data/computercraft/lua/rom/programs/about.lua

@@ -1,8 +1,7 @@
 -- SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
 --
--- SPDX-License-Identifier: LicenseRef-CCPL
+-- SPDX-License-Identifier: MPL-2.0
 
--- Prints information about CraftOS
 term.setTextColor(colors.yellow)
 print(os.version() .. " on " .. _HOST)
 term.setTextColor(colors.white)

projects/core/src/main/resources/data/computercraft/lua/rom/programs/fun/speaker.lua

@@ -1,6 +1,6 @@
 -- SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
 --
--- SPDX-License-Identifier: LicenseRef-CCPL
+-- SPDX-License-Identifier: MPL-2.0
 
 local function get_speakers(name)
     if name then

projects/core/src/test/resources/test-rom/spec/apis/parallel_spec.lua

@@ -1,6 +1,6 @@
 -- SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
 --
--- SPDX-License-Identifier: LicenseRef-CCPL
+-- SPDX-License-Identifier: MPL-2.0
 
 describe("The parallel library", function()
     describe("parallel.waitForAny", function()

projects/core/src/test/resources/test-rom/spec/apis/rednet_spec.lua

@@ -1,6 +1,6 @@
 -- SPDX-FileCopyrightText: 2019 The CC: Tweaked Developers
 --
--- SPDX-License-Identifier: LicenseRef-CCPL
+-- SPDX-License-Identifier: MPL-2.0
 
 describe("The rednet library", function()
     describe("rednet.open", function()

projects/core/src/test/resources/test-rom/spec/support/debug_ext.lua

@@ -1,6 +1,6 @@
 -- SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
 --
--- SPDX-License-Identifier: LicenseRef-CCPL
+-- SPDX-License-Identifier: MPL-2.0
 
 local function getupvalue(fn, name)
     for i = 1, debug.getinfo(fn, "u").nups do

projects/core/src/test/resources/test-rom/spec/support/fake_computer.lua

@@ -1,6 +1,6 @@
 -- SPDX-FileCopyrightText: 2021 The CC: Tweaked Developers
 --
--- SPDX-License-Identifier: LicenseRef-CCPL
+-- SPDX-License-Identifier: MPL-2.0
 
 local function keys(tbl)
     local keys = {}