Else there is an out of bound access in syslogLevelMap.
For example if we use `serverLog(LOG_INFO,…`, later in the code
it tries to access `syslogLevelMap[LOG_INFO]`.
LOG_INFO == 6 but syslogLevelMap only have 4 elements.
Former-commit-id: a1680fa612bdf5f521ea2c06b83994bf0797015a
