Merge 'doc: replace the link to Cassandra compatibility information' …

…from Anna Stuchlik

This PR replaces a link to a section of the ScyllaDB website with little information about ScyllaDB vs. Cassandra with a link to
a documentation section where Cassandra compatibility is covered in detail.

In addition, it removes outdated or irrelevant information about versions from the Cassandra compatibility page.
Now that the documentation is versioned, we shouldn't add such information to the content.

Fixes scylladb/scylla-enterprise#3454

Closes #15562

* github.com:scylladb/scylladb:
  doc: remove outdated/irrelevant version info
  doc: replace the link to Cassandra compatibility

docs/faq.rst

@@ -154,11 +154,11 @@ Check the :doc:`Operating System Support Guide </getting-started/os-support>` fo
 
 Is Scylla Apache Cassandra compatible? Is API / interface X compatible?
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Check the `Cassandra Compatibility <http://www.scylladb.com/technology/status/#cassandra-compatibility>`_ section for compatibility matrix.
+See :doc:`ScyllaDB and Apache Cassandra Compatibility </using-scylla/cassandra-compatibility>` for compatibility matrix.
 
 Which version(s) of Apache Cassandra is Scylla compatible with? Will Scylla be compatible with future Cassandra versions?
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Check the `Cassandra Compatibility <http://www.scylladb.com/technology/status/#cassandra-compatibility>`_ section for current and future Apache Cassandra release compatibility.
+See :doc:`ScyllaDB and Apache Cassandra Compatibility </using-scylla/cassandra-compatibility>` for current and future Apache Cassandra release compatibility.
 
 
 I am upgrading my nodes to a version that uses a newer SSTable format, when will the nodes start using the new SSTable format?

docs/using-scylla/cassandra-compatibility.rst

@@ -2,8 +2,6 @@
 ScyllaDB and Apache Cassandra Compatibility 
 =============================================
 
-Latest update: ScyllaDB 5.0
-
 ScyllaDB is a drop-in replacement for Apache Cassandra 3.11, with additional features from Apache Cassandra 4.0.
 This page contains information about ScyllaDB compatibility with Apache Cassandra. 
 
@@ -101,7 +99,7 @@ Consistency Level (read and write)
 | LOCAL_SERIAL                        | |v|:sup:`*`  |
 +-------------------------------------+--------------+
 
-:sup:`*` From ScyllaDB 4.0. See :doc:`Scylla LWT </using-scylla/lwt>`.
+:sup:`*` See :doc:`Scylla LWT </using-scylla/lwt>`.
 
 
 Snitches
@@ -135,17 +133,15 @@ Partitioners
 +=====================================+==============+
 | Murmur3Partitioner (default)        |   |v|        |
 +-------------------------------------+--------------+
-| RandomPartitioner                   | |x| :sup:`*` |
+| RandomPartitioner                   | |x|          |
 +-------------------------------------+--------------+
 | OrderPreservingPartitioner          | |x|          |
 +-------------------------------------+--------------+
-| ByteOrderedPartitioner              | |x| :sup:`*` |
+| ByteOrderedPartitioner              | |x|          |
 +-------------------------------------+--------------+
 | CollatingOrderPreservingPartitioner |    |x|       |
 +-------------------------------------+--------------+
 
-:sup:`*` Removed in ScyllaDB 4.0
-
 Protocol Options
 ^^^^^^^^^^^^^^^^
 +--------------------------------------------------------------------------+--------------+
@@ -198,12 +194,10 @@ Repair and Consistency
 +----------------------------------------------------------------------+--------------+
 |:doc:`Hinted Handoff </architecture/anti-entropy/hinted-handoff>`     | |v|          |
 +----------------------------------------------------------------------+--------------+
-|:doc:`Lightweight Transactions </using-scylla/lwt>`                   |  |v|:sup:`*` |
+|:doc:`Lightweight Transactions </using-scylla/lwt>`                   |  |v|         |
 +----------------------------------------------------------------------+--------------+
 
 
-:sup:`*` From ScyllaDB 4.0. See :doc:`Scylla LWT </using-scylla/lwt>`.
-
 Replica Replacement Strategy
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -235,12 +229,11 @@ Indexing and Caching
 +==============================================================+======================================================================================+
 |row / key cache                                               | |x| (More on `Scylla memory and cache <http://www.scylladb.com/technology/memory/>`_)|
 +--------------------------------------------------------------+--------------------------------------------------------------------------------------+
-|:doc:`Secondary Index </using-scylla/secondary-indexes>`      | |v| :sup:`*`                                                                         |
+|:doc:`Secondary Index </using-scylla/secondary-indexes>`      | |v|                                                                                  |
 +--------------------------------------------------------------+--------------------------------------------------------------------------------------+
-|:doc:`Materialized Views </using-scylla/materialized-views>`  |  |v|:sup:`*`                                                                         |
+|:doc:`Materialized Views </using-scylla/materialized-views>`  |  |v|                                                                                 |
 +--------------------------------------------------------------+--------------------------------------------------------------------------------------+
 
-:sup:`*` In ScyllaDB Open Source and ScyllaDB Enterprise from 2019.1
 
 Additional Features
 ^^^^^^^^^^^^^^^^^^^
@@ -370,7 +363,7 @@ Create Table Compaction
 |:ref:`TimeWindowCompactionStrategy <TWCS>` (TWCS)   | |v|                                 |
 +----------------------------------------------------+-------------------------------------+
 
-:sup:`*`  Deprecated in ScyllaDB 4.0, use TWCS instead
+:sup:`*`  Deprecated; use TWCS instead.
 
 Create Table Compression
 ........................