- Infrastructure: use one HttpClient instance throughout the lifecycle
- Version update: rewrite the update service and add update prompt window
- Server sharing: add copy link button
- Dependencies: add ReactiveUI.Events.WPF, ReactiveUI.Fody, ReactiveUI.Validation, WPFLocalizeExtension, MdXaml

- Remove StringEx.CS
- Update all dependencies
- Eliminate all warnings

- Use ElementHost in QRCodeForm
- Cleanup: Server.Equals

- Compared to 2c15276: changed socketsHttpHandler to HttpClientHandler due to legacy .NET Framework
- Use System.Net.Http.HttpClient for GeositeUpdater
- New update check mechanism: first download checksum and compare, only download GeoSite DB on different checksum
- Verifiy downloaded GeoSite DB by comparing sha256sum before committing the change

in case gfwlist no longer update

Init JS variable in more reliable and quick way, reduce redundant code

- Redirect the nuget \3rd folder to ..\packages folder as default by
  remove the nuget.config file
- Update csproj file: remove unnecessary scripts for old nuget
  packages on old .Net framework
- Upgrade nuget packages to .Net framework 4.7.2 as the target framework
- Downgrade Fody to 4.2.1. The 5.0.0+ requires MSBuild 16 and above

- Uncompress the text file for better version control
- Touch the PAC files in first place

- Split the file operations to new PACDaemon
- More precise matching logic for handling PAC content http request

Support Windows 10 1903 Light Theme

Support Windows 10 1903 Light Theme (Menu icon color)

binary modified via OD with tray icon function calls bypassed

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Auto register hotkeys

- update mbedtls to 2.7.0, use new md5 api
- update libsodium to 1.0.16
- static link to openssl 1.1.0g, check libsscrypto repo for detail

Add OpenSSL 1.1.0g support due to hardware acceleration

Note: If you want to compile it by yourself, please make sure
do NOT use `no-asm` configure option, since the main point of
this commit is to utilize assembly in openssl

Add OpenSSL test

to get rid of deep copy

- update NuGet pkg

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

replace zxing with NuGet pkg