Document that syslog output is additive to local output
Document that syslog output is additive to local output

[#113966825]

Signed-off-by: Frank Kotsianas <7292b1604e9876e8e1934a101736830424483797@pivotal.io>

cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release