
Fixes NULL dereference in SSL_check_chain() for TLS 1.3, marked with high severity, assigned CVE-2020-1967. Ref: https://www.openssl.org/news/secadv/20200421.txt Cherry-pick from openwrt/openwrt@3773ae1. Also add mirror for mainland China user in this commit. Signed-off-by: Petr Štetiar <ynezz@true.cz> Signed-off-by: CN_SZTL <cnsztl@project-openwrt.eu.org> Co-authored-by: Petr Štetiar <ynezz@true.cz>