Added basic TCP client/server support
Added support for SSL handshake and dummy authentication
Added support for encryption
Added support for HMAC
Added support for changekey command
Support for authentication using PAM
Change to use ivpn pam service
Check for EUID
Install sigchld handler to prevent zombie processes
Add ivpn pam configuration file
Added support for relinquishing superuser privileges
On server side, relinquish to the user that has logged in
Forcing TLS 1.2 for all control channel