yaml: sync with new stream engine

suricata.yaml.in

@@ -1184,11 +1184,9 @@ flow-timeouts:
 #     toserver-chunk-size: 2560 # inspect raw stream in chunks of at least
 #                               # this size.  Can be specified in kb, mb,
 #                               # gb.  Just a number indicates it's in bytes.
-#                               # The max acceptable size is 4024 bytes.
 #     toclient-chunk-size: 2560 # inspect raw stream in chunks of at least
 #                               # this size.  Can be specified in kb, mb,
 #                               # gb.  Just a number indicates it's in bytes.
-#                               # The max acceptable size is 4024 bytes.
 #     randomize-chunk-size: yes # Take a random value for chunk size around the specified value.
 #                               # This lower the risk of some evasion technics but could lead
 #                               # detection change between runs. It is set to 'yes' by default.
@@ -1202,9 +1200,6 @@ flow-timeouts:
 #                               # raw is for content inspection by detection
 #                               # engine.
 #
-#     chunk-prealloc: 250       # Number of preallocated stream chunks. These
-#                               # are used during stream inspection (raw).
-#
 #     segment-prealloc: 2048    # number of segments preallocated per thread
 #
 #     check-overlap-different-data: true|false
@@ -1227,7 +1222,6 @@ stream:
     randomize-chunk-size: yes
     #randomize-chunk-range: 10
     #raw: yes
-    #chunk-prealloc: 250
     #segment-prealloc: 2048
     #check-overlap-different-data: true