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Arne Schwabe's OpenSSL fix for Debian Bug#958296 "Fix tls_ctx_client/server_new leaving error on OpenSSL error stack" <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=958296> [1] Selva Nair's auth-pam fixes "Parse static challenge response in auth-pam plugin" "Accept empty password and/or response in auth-pam plugin" Re-diff (with make makepatch) older patches. Reported by: Jonas Andradas via Debian BTS Obtained from: Arne Schwabe, Selva Nair <https://github.com/OpenVPN/openvpn/tree/release/2.4> MFH: 2020Q2 (blanket for backporting reliability fixes)