Retract hash algo proposal for the moment

specs/bep-v1.rst

@@ -337,7 +337,7 @@ folder Flags field contains the following single bit flags:
      0                   1                   2                   3
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-    |                       Reserved                  | Hash  |D|P|R|
+    |                           Reserved                      |D|P|R|
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
 :Bit 31 ("R", Read Only):
@@ -351,14 +351,6 @@ folder Flags field contains the following single bit flags:
 :Bit 29 ("D", Ignore Deletes):
     is set for folders that the device will ignore deletes for.
 
-:Bits 25-28 (Hash):
-    indicates the hash algorithm in use for this folder, as a four bit integer.
-    The value values are:
-
-    - 0: SHA256
-    - 1: Murmur3-128
-    - 2-15: Reserved for future usage
-
 The **Options** field contains a list of options that apply to the folder.
 
 Fields (Device Structure)

users/hashalgo.rst

@@ -1,53 +0,0 @@
-.. _hashalgo:
-
-Hash Algorithms
-===============
-
-.. versionadded:: 0.13.0
-
-Description
------------
-
-A folder can use one of several available hash algorithms when determining
-changes to files. The algorithms have different properties -- see the table
-below where the differences between the algorithms are highlighted.
-
-=========  ========  =============  =================  ================
-Algorithm  Speed     Delta Changes  Efficient Renames  Efficient Copies
-=========  ========  =============  =================  ================
-SHA256     Slow      Yes            Yes                **Yes**
-Murmur3    **Fast**  Yes            Yes                No
-=========  ========  =============  =================  ================
-
-Speed:
-	This affects the speed with which content can be hashed. A "slow"
-	algorithm requires a lot of CPU power, while a "fast" algorithm does not.
-	The actual scanning speed may however be limited by the disk's transfer
-	rate.
-
-Delta Changes:
-	Indicates whether changes to the contents of a file are transferred
-	efficiently. "Yes" means that only the changed blocks are transferred,
-	"no" means the whole file must be resent.
-
-Efficient Renames:
-	Indicates whether renaming a file on one device results in a renaming
-	operation on another device ("yes"), or whether the renamed file must be
-	transferred over the network ("no").
-
-Efficient Copies:
-	Indicates whether a copy of a file on one device results in a local copy
-	operation on another device ("yes"), or whether the copy must be
-	transferred over the network ("no").
-
-Changing the Folder Hash Algorithm
-----------------------------------
-
-The hash algorithm can only be set when a folder is added to the
-configuration, it can not be changed afterwards. To change the hash algorithm
-of a folder it must be removed and then added again with the new hash
-algorithm. This necessarily results in a full (slow) rescan of the folder
-contents.
-
-The hash algorithm for a given folder must be the same for all devices sharing
-that folder.