Abort if CRL file can't be stat-ed in ssl_init

Abort if CRL file can't be stat-ed in ssl_init

Now that the path for the CRL file is handled correctly when using
chroot, there's no good reason for the file to be inaccessible during
ssl_init().

This commit ensures that the CRL file is accessed successfully at least
once, which fixes a bug where the mbedtls version of OpenVPN wouldn't
use a reloaded CRL if it initially failed to access the file.

Signed-off-by: Max Fillinger <maximilian.fillinger@foxcrypto.com>
Acked-by: Antonio Quartulli <antonio@openvpn.net>
Message-Id: <20210415093454.18324-1-maximilian.fillinger@foxcrypto.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg22118.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>