cyrus-sasl security, bug fix, and enhancement update

2.1.27-5 - Reduce excessive GSSAPI plugin logging - Resolves: rhbz1274734 2.1.27-4 - Add support for setting maxssf=0 in GSS-SPNEGO - Resolves: rhbz1822133 2.1.27-3 - Backport GSSAPI Channel Bindings support - Resolves: rhbz1817054 2.1.27-2 - Backport fix for CVE-2019-19906 - Resolves: rhbz180403...