Update HTTPParserC for Proxyman Core

[NghiaTranUIT]

🐶 Brief

We encountered couple crash on HTTPParserC, and it's impossible to fix. We have to upgrade it to latest version

👑 Criteria

• Update HTTPParserC
• Refactor how we parse message

[NghiaTranUIT]

All done 💯

🤯 Changelogs

• Safe guard for ! (force)
• Fix potential bugs from AppCenter
• Remove all old HTTPParserC and custom code
• Adopt the HTTPParserC from Telegraph
• Refactor how we terminal the alive-connection: We don't do it manually by detecting the Terminal character from chunked connection -> HTTPParserC does it correctly -> High performance
• Update iOS Setup guide for iOS 12.2