Merge #1465: release: prepare for 0.4.1

672053d release: prepare for 0.4.1 (Jonas Nick)

Pull request description:

ACKs for top commit:
  sipa:
    ACK 672053d
  real-or-random:
    ACK 672053d
  hebasto:
    ACK 672053d

Tree-SHA512: de78fd4588061ffc9b869d86c6d639dce06ed215c0614a888827054014c073a97b106268e5d5773967f9407c70ddc0f27326ee9c858dce5d52af7f33d2d46b69

Author: real-or-random

CHANGELOG.md

@@ -5,12 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.4.1] - 2023-12-21
 
 #### Changed
  - The point multiplication algorithm used for ECDH operations (module `ecdh`) was replaced with a slightly faster one.
  - Optional handwritten x86_64 assembly for field operations was removed because modern C compilers are able to output more efficient assembly. This change results in a significant speedup of some library functions when handwritten x86_64 assembly is enabled (`--with-asm=x86_64` in GNU Autotools, `-DSECP256K1_ASM=x86_64` in CMake), which is the default on x86_64. Benchmarks with GCC 10.5.0 show a 10% speedup for `secp256k1_ecdsa_verify` and `secp256k1_schnorrsig_verify`.
 
+#### ABI Compatibility
+The ABI is backward compatible with versions 0.4.0 and 0.3.x.
 
 ## [0.4.0] - 2023-09-04
 
@@ -111,7 +113,7 @@ This version was in fact never released.
 The number was given by the build system since the introduction of autotools in Jan 2014 (ea0fe5a5bf0c04f9cc955b2966b614f5f378c6f6).
 Therefore, this version number does not uniquely identify a set of source files.
 
-[unreleased]: https://github.com/bitcoin-core/secp256k1/compare/v0.4.0...HEAD
+[0.4.1]: https://github.com/bitcoin-core/secp256k1/compare/v0.4.0...v0.4.1
 [0.4.0]: https://github.com/bitcoin-core/secp256k1/compare/v0.3.2...v0.4.0
 [0.3.2]: https://github.com/bitcoin-core/secp256k1/compare/v0.3.1...v0.3.2
 [0.3.1]: https://github.com/bitcoin-core/secp256k1/compare/v0.3.0...v0.3.1

configure.ac

@@ -6,7 +6,7 @@ AC_PREREQ([2.60])
 define(_PKG_VERSION_MAJOR, 0)
 define(_PKG_VERSION_MINOR, 4)
 define(_PKG_VERSION_PATCH, 1)
-define(_PKG_VERSION_IS_RELEASE, false)
+define(_PKG_VERSION_IS_RELEASE, true)
 
 # The library version is based on libtool versioning of the ABI. The set of
 # rules for updating the version can be found here: