/// \[[docs.microsoft.com](https://docs.microsoft.com/en-us/windows/win32/api/securitybaseapi/nf-securitybaseapi-reverttoself)\] RevertToSelf
///
/// ### Example
/// ```
/// use firehazard::*;
/// use winapi::shared::winerror::ERROR_BAD_TOKEN_TYPE;
/// let token = open_process_token(get_current_process(), token::ALL_ACCESS).unwrap();
/// let imp = duplicate_token_ex(
/// &token, token::ALL_ACCESS, None, security::Delegation, token::Impersonation
/// ).unwrap();
///
/// open_thread_token(get_current_thread(), token::ALL_ACCESS, true).expect_err("no token was set, shouldn't have been able to open_thread_token");
/// revert_to_self().expect("wasn't impersonating, but revert_to_self should succeed anyways");
/// set_thread_token(None, &imp).unwrap();
/// open_thread_token(get_current_thread(), token::ALL_ACCESS, true).expect("token was set, should've read back successfully");
/// revert_to_self().expect("was impersonating, revert_to_self should've succeeded");
/// open_thread_token(get_current_thread(), token::ALL_ACCESS, true).expect_err("reverted token, shouldn't have been able to open_thread_token");
/// revert_to_self().expect("wasn't impersonating, should succeed anyways");
/// open_thread_token(get_current_thread(), token::ALL_ACCESS, true).expect_err("reverted token, shouldn't have been able to open_thread_token");
/// ```