Is your feature request related to a problem? Please describe.
CFE_ES_SYSLOG_APPEND is used is just a few places (cds, esmempool), everywhere else is CFE_ES_WriteToSysLog.

Describe the solution you'd like
Consistency is preferred for maintenance and usability, If there isn't sufficient justification for a separate macro, remove it and use CFE_ES_WriteToSysLog.

Describe alternatives you've considered
If there is clear justification, consider adding to the macro documentation/comments

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC

edit - typo