Enable Cloudflare zlib by default in CI.

Also turn off building dcm2niibatch.

.appveyor.yml

@@ -39,7 +39,7 @@ for:
         - job_name: win
 
     build_script:
-      - cmake -Wno-dev -DBATCH_VERSION=ON -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B build
+      - cmake -Wno-dev -DZLIB_IMPLEMENTATION=Cloudflare -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B build
       - cmake --build build --config %configuration%
 
     after_build:
@@ -53,7 +53,7 @@ for:
 
     build_script:
       - export CC=gcc-8 CXX=g++-8
-      - cmake -Wno-dev -DBATCH_VERSION=ON -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B build
+      - cmake -Wno-dev -DZLIB_IMPLEMENTATION=Cloudflare -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B build
       - cmake --build build
 
     after_build:
@@ -68,16 +68,15 @@ for:
 
     build_script:
       - sudo xcode-select -s /Applications/Xcode-11.3.1.app
-      - cmake -Wno-dev -DCMAKE_OSX_ARCHITECTURES=x86_64 -DBATCH_VERSION=ON -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B intel
+      - cmake -Wno-dev -DCMAKE_OSX_ARCHITECTURES=x86_64 -DZLIB_IMPLEMENTATION=Cloudflare -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B intel
       - cmake --build intel
       - sudo xcode-select -s /Applications/Xcode-12.3.app
-      - cmake -Wno-dev -DCMAKE_OSX_ARCHITECTURES=arm64 -DBATCH_VERSION=ON -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B apple
+      - cmake -Wno-dev -DCMAKE_OSX_ARCHITECTURES=arm64 -DZLIB_IMPLEMENTATION=Cloudflare -DUSE_OPENJPEG=GitHub -DUSE_JPEGLS=ON -B apple
       - cmake --build apple
 
     after_build:
       - mkdir -p build/bin
       - lipo -create -output build/bin/dcm2niix intel/bin/dcm2niix apple/bin/dcm2niix
-      - lipo -create -output build/bin/dcm2niibatch intel/bin/dcm2niibatch apple/bin/dcm2niibatch
       - strip -Sx build/bin/*
       - 7z a dcm2niix_macos.zip ./build/bin/* &>/dev/null
       - appveyor PushArtifact dcm2niix_macos.zip