sshd updates USERDOMAIN env variable correctly

USERDOMAIN environment variable was not being updated by sshd before s
shell or subsystem was started, hence it was left pointing to local
logged on user;'s domain. Now we set it correctly for the remote ssh
user's domain or local account

Author: quamrulmina

session.c

@@ -740,6 +740,11 @@ do_exec_no_pty(Session *s, const char *command)
   SetEnvironmentVariableW(L"HOME", s -> pw -> pw_dir);
   SetEnvironmentVariableW(L"USERPROFILE", s -> pw -> pw_dir);
 
+  // find the server name of the domain controller which created this token
+  GetDomainFromToken ( &hToken, buf, sizeof(buf));
+  if (buf[0])
+	  SetEnvironmentVariable("USERDOMAIN", buf );
+
   /*
    * Set SSH_CLIENT variable.
    */