readme: add musl libc support and update OpenBSD and FreeBSD #2083

	name: Android

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	env:
	openssl: 3.2.1

	jobs:
	android:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- uses: actions/cache@v4
	id: openssl
	with:
	path: openssl
	key: ${{ runner.os }}-android-openssl-${{ env.openssl }}

	- name: "build openssl"
	if: steps.openssl.outputs.cache-hit != 'true'
	run: \|
	wget -q https://www.openssl.org/source/openssl-$openssl.tar.gz
	tar -xzf openssl-$openssl.tar.gz
	mv openssl-$openssl openssl
	cd openssl && ANDROID_NDK_ROOT=$ANDROID_NDK_LATEST_HOME PATH=$ANDROID_NDK_LATEST_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH ./Configure android-arm64 no-shared no-tests -U__ANDROID_API__ -D__ANDROID_API__=21 && PATH=$ANDROID_NDK_LATEST_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH make build_libs && cd ..

	- name: build
	run: \|
	cmake -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_LATEST_HOME/build/cmake/android.toolchain.cmake -DANDROID_ABI="arm64-v8a" -DANDROID_PLATFORM=android-21 -DOPENSSL_ROOT_DIR=openssl -DOPENSSL_INCLUDE_DIR=openssl/include -DOPENSSL_CRYPTO_LIBRARY=openssl/libcrypto.a -DOPENSSL_SSL_LIBRARY=openssl/libssl.a .
	cmake --build . -j 2

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