Version 3.06.31 of Small HTTP server and Android VPN client

[Maxim Feoktistov]

Version 3.06.31 has been created.

+ Added support for limiting traffic on the VPN server.
* Changed incoming/outgoing traffic counters to 64 bits.
* In the security library support files, the default maximum version has been changed to TLS 1.2. When the maximum TLS version is 1.3, the Android API client is unable to establish a connection. In older versions for GnuTLS you can use "NORMAL:+ANON-DH:+VERS-TLS1.2:-VERS-TLS1.3" as a library parameter.
- VPN DNS configuration parameter has been fixed.
- Fixed TLS SetPriority for executable files with built-in security library.
+ Added support for DNS-based Named Entity Authentication (DANE) (RFC6698) to the DNS server.

Also an Android version of the VPN client available for open testing in Google Play Market
+ This version adds certificate checking. If the application detects an unknown certificate, it asks the user for access confirmation and remembers it.
+ A status bar and traffic counters have been added to the interface.
* An issue with handshake was fixed by changing the libraries in the backend. The maximum protocol version has been reduced to TLS 1.2. In this case, the SSL client from the Android API can perform the handshake.
+ Added saving of multiple servers
+ Added LAN only mode.