netflow: add missing read buffer size configuration (#5686)

Author: efd6

packages/netflow/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "2.6.1"
+  changes:
+    - description: Add UDP read buffer configuration option.
+      type: bugfix
+      link: https://github.com/elastic/integrations/pull/5686
 - version: "2.6.0"
   changes:
     - description: Allow specification of internal network ranges.

packages/netflow/data_stream/log/manifest.yml

@@ -41,6 +41,13 @@ streams:
         required: true
         show_user: false
         default: 8192
+      - name: read_buffer
+        type: text
+        title: Read Buffer Size
+        description: |
+          Sets the size of the OS read buffer on the UDP socket in the format KiB/MiB, an example would be: 10KiB. If it is not set, the existing operating system's default value is used.
+        required: false
+        show_user: false
       - name: custom_definitions
         type: text
         title: Custom definitions

packages/netflow/manifest.yml

@@ -1,7 +1,7 @@
 format_version: 1.0.0
 name: netflow
 title: NetFlow Records
-version: "2.6.0"
+version: "2.6.1"
 license: basic
 description: Collect flow records from NetFlow and IPFIX exporters with Elastic Agent.
 type: integration