2.6.4
This patch level release of the ruby driver has the following significant changes:
Improvements:
RUBY-1470 Enable SNI on jruby where possible
RUBY-1651 Backport sdam logging improvements to 2.6
Bugs fixed:
RUBY-1433 OperationError#code not set on duplicate key error
RUBY-1550 Error::Parser fails to correctly handle writeErrors
RUBY-1507 isMaster response changing causes nil reference in the session pool
Version 2.6.3 was skipped due to a certificate issue.