• BigInteger/RSA: don't compare openssl versions > 1.0 (#946)
• RSA: don't attempt to use the CRT when zero value components exist (#980)
• RSA: zero salt length RSA signatures don't work (#1002)
• ASN1: fix PHP Warning on PHP 7.1 (#1013)
• X509: set parameter fields to null for CSR's / RSA (#914)
• CRL optimizations (#1000)
• SSH2: fix "Expected SSH_FXP_STATUS or ..." error (#999)
• SFTP: make symlinks support relative target's (#1004)
• SFTP: fix sending stream resulting in zero byte file (#995)