more specific level control for syslog logging
shutdown messages via separate Redis connections, fix Ruby 2 error
Merge pull request #264 from ali-graham/260_fix_syslog_levels

Fix syslog output levels
Merge pull request #265 from ali-graham/261_ruby_2_shutdown_error

shutdown messages via separate Redis connections, fix Ruby 2 error
revert some mistakes, fix shutdown redis driver
Merge pull request #267 from ali-graham/261_ruby_2_shutdown_error

revert some mistakes, fix shutdown redis driver