doc: add removal of individual json loggers

Add link to multiple eve instances as a replacement for this
feature.

doc/userguide/output/eve/eve-json-output.rst

@@ -353,6 +353,8 @@ The example above rotates eve-log each 30 seconds. This could be replaced with
 ``30m`` to rotate every 30 minutes, ``30h`` to rotate every 30 hours, ``30d``
 to rotate every 30 days, or ``30w`` to rotate every 30 weeks.
 
+.. _multiple-eve-instances:
+
 Multiple Logger Instances
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 

doc/userguide/upgrade.rst

@@ -49,6 +49,9 @@ Removals
 ~~~~~~~~
 - File-store v1 has been removed. If using file extraction, the file-store configuration
   will need to be updated to version 2. See :ref:`filestore-update-v1-to-v2`.
+- Individual Eve (JSON) loggers have been removed. For example,
+  ``stats-json``, ``dns-json``, etc. Use multiple Eve logger instances
+  if this behavior is still required. See :ref:`multiple-eve-instances`.
 
 Upgrading 4.1 to 5.0
 --------------------