Merge branch '6.3' into 6.4

* 6.3:
  [VarDumper] Fix CSS alignment in HtmlDumper
  allow environment variables starting with an underscore
  Update a test
  [Mailer][Postmark] Add missing changelog for webhook support
  Remove #StandWithUkraine
  [Notifier][Smsc] Require login and password

Author: fabpot

Tests/Fixtures/containers/container8.php

@@ -12,7 +12,7 @@
     'utf-8 valid string' => "\u{021b}\u{1b56}\ttest",
     'binary' => "\xf0\xf0\xf0\xf0",
     'binary-control-char' => "This is a Bell char \x07",
-    'console banner' => "\e[37;44m#StandWith\e[30;43mUkraine\e[0m",
+    'console banner' => "\e[37;44mHello\e[30;43mWorld\e[0m",
     'null string' => 'null',
     'string of digits' => '123',
     'string of digits prefixed with minus character' => '-123',

Tests/Fixtures/php/services8.php

@@ -98,7 +98,7 @@ protected function getDefaultParameters(): array
             'utf-8 valid string' => 'ț᭖	test',
             'binary' => 'ðððð',
             'binary-control-char' => 'This is a Bell char ',
-            'console banner' => '[37;44m#StandWith[30;43mUkraine[0m',
+            'console banner' => '[37;44mHello[30;43mWorld[0m',
             'null string' => 'null',
             'string of digits' => '123',
             'string of digits prefixed with minus character' => '-123',

Tests/Fixtures/xml/services8.xml

@@ -21,7 +21,7 @@
     <parameter key="utf-8 valid string">&#x21B;&#x1B56;	test</parameter>
     <parameter key="binary" type="binary">8PDw8A==</parameter>
     <parameter key="binary-control-char" type="binary">VGhpcyBpcyBhIEJlbGwgY2hhciAH</parameter>
-    <parameter key="console banner" type="binary">G1szNzs0NG0jU3RhbmRXaXRoG1szMDs0M21Va3JhaW5lG1swbQ==</parameter>
+    <parameter key="console banner" type="binary">G1szNzs0NG1IZWxsbxtbMzA7NDNtV29ybGQbWzBt</parameter>
     <parameter key="null string" type="string">null</parameter>
     <parameter key="string of digits" type="string">123</parameter>
     <parameter key="string of digits prefixed with minus character" type="string">-123</parameter>

Tests/Fixtures/yaml/services8.yml

@@ -7,7 +7,7 @@ parameters:
     utf-8 valid string: "ț᭖\ttest"
     binary: !!binary 8PDw8A==
     binary-control-char: !!binary VGhpcyBpcyBhIEJlbGwgY2hhciAH
-    console banner: "\e[37;44m#StandWith\e[30;43mUkraine\e[0m"
+    console banner: "\e[37;44mHello\e[30;43mWorld\e[0m"
     null string: 'null'
     string of digits: '123'
     string of digits prefixed with minus character: '-123'