Baidameng PPTP/L2TP Connector

Usage:
1. Run baidameng_pptp_l2tp.exe.
2. Enter server, account, and password.
3. Choose Auto, L2TP, or PPTP, then connect.

Notes:
- No .NET or Python runtime is required.
- Compatible target: Windows 7 SP1 and later.
- This release is x86 by default, so it can run on both 32-bit and 64-bit Windows.
- Runtime profile and phonebook files are generated under:
  %APPDATA%\Baidameng\BaidamengPPTP-L2TP
- Some VPN operations may require administrator privileges depending on system policy.
