yaml: improve stream-depth comments

suricata.yaml.in

@@ -405,7 +405,9 @@ outputs:
       # sha1 and sha256
       #force-hash: [md5]
       force-filestore: no # force storing of all files
-      stream-depth: 1mb # reassemble 1mb into a stream, set to no to disable
+      # override global stream-depth for sessions in which we want to
+      # perform file extraction. Set to 0 for unlimited.
+      #stream-depth: 0
       #waldo: file.waldo # waldo file to store the file_id across runs
 
   # output module to log files tracked in a easily parsable json format
@@ -701,7 +703,7 @@ app-layer:
       # If the limit is reached, app-layer-event:modbus.flooded; will match.
       #request-flood: 500
 
-      # Stream reassembly size for modbus, default is 0
+      # Stream reassembly size for modbus. By default track it completely.
       stream-depth: 0
 
       enabled: no