Uniform meta file names (#2248)

* rename changelog to CHANGELOG
* Rename COPYING to LICENSE
* Rename cluster.markdown to cluster.md
* Rename README.markdown to README.md
* Rename INSTALL.markdown to INSTALL.md\
* Rename sentinel.markdown to sentinel.md
* Rename arrays.markdown to array.md
* fix all references

8 files changed, 18 insertions, 20 deletions

diff --git a/Changelog.md b/CHANGELOG.md
index 70f22987..c345854e 100644
--- a/Changelog.md
+++ b/CHANGELOG.md
@@ -7,8 +7,6 @@ and PhpRedis adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
-
-
 ## [5.3.5RC1] - 2021-11-16 ([GitHub](https://github.com/phpredis/phpredis/releases/5.3.5RC1), [PECL](https://pecl.php.net/package/redis/5.3.5RC1))
 
 ### Sponsors :sparkling_heart:
diff --git a/INSTALL.markdown b/INSTALL.md
index 7e8e025c..bd3fbd98 100644
--- a/INSTALL.markdown
+++ b/INSTALL.md
@@ -28,7 +28,7 @@ The extension also may compress data before sending it to Redis server, if you r
 
 You can generate a debian package for PHP5, accessible from Apache 2 by running `./mkdeb-apache2.sh` or with `dpkg-buildpackage` or `svn-buildpackage`.
 
-This extension exports a single class, [Redis](./README.markdown#class-redis) (and [RedisException](./README.markdown#class-redisexception) used in case of errors). Check out https://github.com/ukko/phpredis-phpdoc for a PHP stub that you can use in your IDE for code completion.
+This extension exports a single class, [Redis](./README.md#class-redis) (and [RedisException](./README.md#class-redisexception) used in case of errors). Check out https://github.com/ukko/phpredis-phpdoc for a PHP stub that you can use in your IDE for code completion.
 
 
 # Binary packages
diff --git a/COPYING b/LICENSE
index 3cc8b777..3cc8b777 100644
--- a/COPYING
+++ b/LICENSE
diff --git a/README.markdown b/README.md
index 6f2d7b15..efa85e9b 100644
--- a/README.markdown
+++ b/README.md
@@ -31,9 +31,9 @@ You can also make a one-time contribution with one of the links below.
 1. [Installing/Configuring](#installingconfiguring)
    * [Installation](#installation)
    * [PHP Session handler](#php-session-handler)
-   * [Distributed Redis Array](./arrays.markdown#readme)
-   * [Redis Cluster support](./cluster.markdown#readme)
-   * [Redis Sentinel support](./sentinel.markdown#readme)
+   * [Distributed Redis Array](./array.md#readme)
+   * [Redis Cluster support](./cluster.md#readme)
+   * [Redis Sentinel support](./sentinel.md#readme)
    * [Running the unit tests](#running-the-unit-tests)
 1. [Classes and methods](#classes-and-methods)
    * [Usage](#usage)
@@ -61,7 +61,7 @@ You can also make a one-time contribution with one of the links below.
 ## Installation
 
 For everything you should need to install PhpRedis on your system,
-see the [INSTALL.markdown](./INSTALL.markdown) page.
+see the [INSTALL.md](./INSTALL.md) page.
 
 ## PHP Session handler
 
@@ -1173,7 +1173,7 @@ _**Description**_:  Scan the keyspace for keys
 ##### *Return value*
 *Array, boolean*:  This function will return an array of keys or FALSE if Redis returned zero keys
 
-*Note*: SCAN is a "directed node" command in [RedisCluster](cluster.markdown#directed-node-commands)
+*Note*: SCAN is a "directed node" command in [RedisCluster](cluster.md#directed-node-commands)
 
 ##### *Example*
 ~~~php
diff --git a/arrays.markdown b/array.md
index c084f70f..c084f70f 100644
--- a/arrays.markdown
+++ b/array.md
diff --git a/cluster.markdown b/cluster.md
index 96d0fa43..96d0fa43 100644
--- a/cluster.markdown
+++ b/cluster.md
diff --git a/package.xml b/package.xml
index 350aef5b..cdc815a5 100644
--- a/package.xml
+++ b/package.xml
@@ -44,7 +44,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     support for detecting a dirty connection, as well as many other fixes
     and improvements.
 
-    You can find a detailed list of changes in Changelog.md and package.xml
+    You can find a detailed list of changes in CHANGELOG.md and package.xml
     or by inspecting the git commit logs.
 
     --- Sponsors ---
@@ -116,13 +116,13 @@ http://pear.php.net/dtd/package-2.0.xsd">
  </notes>
  <contents>
   <dir name="/">
-   <file role='doc' name='COPYING'/>
+   <file role='doc' name='LICENSE'/>
    <file role='doc' name='CREDITS'/>
-   <file role='doc' name='README.markdown'/>
-   <file role='src' name='INSTALL.markdown'/>
-   <file role='doc' name='arrays.markdown'/>
-   <file role='doc' name='cluster.markdown'/>
-   <file role='doc' name='sentinel.markdown'/>
+   <file role='doc' name='README.md'/>
+   <file role='src' name='INSTALL.md'/>
+   <file role='doc' name='arrays.md'/>
+   <file role='doc' name='cluster.md'/>
+   <file role='doc' name='sentinel.md'/>
    <file role='src' name='backoff.c'/>
    <file role='src' name='backoff.h'/>
    <file role='src' name='cluster_library.c'/>
@@ -213,7 +213,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     This release fixes a multi/pipeline segfault on apple silicon as well as
     two small compression related bugs.
 
-    You can find a detailed list of changes in Changelog.md and package.xml
+    You can find a detailed list of changes in CHANGELOG.md and package.xml
 
     * Fix multi/pipeline segfault on Apple silicon [e0796d48] (Michael Grunder)
     * Pass compression flag on HMGET in RedisCluster [edc724e6] (Adam Olley)
@@ -240,7 +240,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     This release mostly includes just small PHP 8 Windows compatibility fixes
     such that pecl.php.net can automatically build Windows DLLs.
 
-    You can find a detailed list of changes in Changelog.md and package.xml
+    You can find a detailed list of changes in CHANGELOG.md and package.xml
 
     * Fix PHP8 Windows includes [270b4db8] (Jan-E)
     * Fix hash ops for php 8.0.1 [87297cbb] (defender-11)
@@ -263,7 +263,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
    <date>2020-10-22</date>
    <notes>
     This release containse some bugfixes and small improvements.
-    You can find a detailed list of changes in Changelog.md and package.xml
+    You can find a detailed list of changes in CHANGELOG.md and package.xml
 
     * Sponsors
       ~ Audiomack - https://audiomack.com
@@ -318,7 +318,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     of if you're having trouble building 5.3.0 because the php_hash_bin2hex
     symbol is missing.
 
-    You can find a detailed list of changes in Changelog.md and package.xml
+    You can find a detailed list of changes in CHANGELOG.md and package.xml
 
     * Sponsors
       ~ Audiomack - https://audiomack.com
@@ -348,7 +348,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
     This release contains initial support for Redis 6 ACLs, LZ4 compression,
     and many more fixes and improvements.
 
-    You can find a detailed list of changes in Changelog.md and package.xml
+    You can find a detailed list of changes in CHANGELOG.md and package.xml
 
     A special thanks to BlueHost for sponsoring ACL support \o/
 
diff --git a/sentinel.markdown b/sentinel.md
index ec0adec5..ec0adec5 100644
--- a/sentinel.markdown
+++ b/sentinel.md