Socket.Close calls Socket.Dispose internally

Cause: process's additional environment variables are not expanded
by correctly.

Innovated by studentmain (StudentEx <scncgz@gmail.com>)

Removed redundant method call

Auto register hotkeys

* Update LogForm.cs
* Update ja.txt
* Update zh_CN.txt
* Update zh_TW.txt
* Update the control name

- Naming
- Cleanup
- Move logic to controller

- Portable mode ON: executable file's folder
- Portable mode OFF: current user's temp folder

* Translation
* Environment Variables support

* Add tooltips
* Translations

[Fix] QRCodeSplashForm.cs无法在窗体设计工具中打开

change some translations

Move PerPixelAlphaForm's code into QRCodeSplashForm to avoid 2 derived class of Form in same file.

Before: QRCodeSplashForm -> PerPixelAlphaForm -> Form
After: QRCodeSplashForm -> Form

Server address should not be encoded

Because the splash is already on the target display, the target rect doesn't need to calculate with the screen position.

"Allow Clients from LAN" --> "Allow other Devices to connect"

just uncomment the specific node in app.config, no need to recompile
to take effect. It will be shipped as Shadowsocks.exe.config after built.

This is for debugging only.

- 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

Don't use Cname

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