examples: Use SPDX licence identifiers

As we do in the main source directory; use SPDX license identifiers in
all of the examples files. The SPDX license is a balance between minimal
noise and having license coverage for those who want/like/need it.

Note, removes the "written by" section if it uses Andrews name because
he has stated elsewhere that this is ok. Leaves Thomas' attribution in
there.

Author: tcharding

examples/htlc.rs

@@ -1,16 +1,5 @@
-// Miniscript
-// Written in 2019 by
-//    Thomas Eizinger <thomas@coblox.tech>
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// Written by Thomas Eizinger <thomas@coblox.tech>
+// SPDX-License-Identifier: CC0-1.0
 
 //! Example: Create an HTLC with miniscript using the policy compiler
 

examples/parse.rs

@@ -1,16 +1,4 @@
-// Miniscript
-// Written in 2019 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// SPDX-License-Identifier: CC0-1.0
 
 //! Example: Parsing a descriptor from a string.
 

examples/psbt.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: CC0-1.0
+
 use bitcoin::consensus::encode::deserialize;
 use bitcoin::hashes::hex::FromHex;
 use bitcoin::psbt::Psbt;

examples/psbt_sign_finalize.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: CC0-1.0
+
 use std::collections::BTreeMap;
 use std::str::FromStr;
 

examples/sign_multisig.rs

@@ -1,16 +1,4 @@
-// Miniscript
-// Written in 2019 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// SPDX-License-Identifier: CC0-1.0
 
 //! Example: Signing a 2-of-3 multisignature.
 

examples/taproot.rs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: CC0-1.0
+
 use std::collections::HashMap;
 use std::str::FromStr;
 

examples/verify_tx.rs

@@ -1,16 +1,4 @@
-// Miniscript
-// Written in 2019 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// SPDX-License-Identifier: CC0-1.0
 
 //! Example: Verifying a signed transaction.
 

examples/xpub_descriptors.rs

@@ -1,16 +1,4 @@
-// Miniscript
-// Written in 2019 by
-//     Andrew Poelstra <apoelstra@wpsoftware.net>
-//
-// To the extent possible under law, the author(s) have dedicated all
-// copyright and related and neighboring rights to this software to
-// the public domain worldwide. This software is distributed without
-// any warranty.
-//
-// You should have received a copy of the CC0 Public Domain Dedication
-// along with this software.
-// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
-//
+// SPDX-License-Identifier: CC0-1.0
 
 //! Example: Parsing a xpub and getting an address.