Merge branch '3.4' into 4.3

* 3.4:
  Improve some URLs
  Fix test compatibility with 4.x components
  [Cache] cs fix

Constraints/AbstractComparisonValidator.php

@@ -64,7 +64,7 @@ public function validate($value, Constraint $constraint)
         // Convert strings to DateTimes if comparing another DateTime
         // This allows to compare with any date/time value supported by
         // the DateTime constructor:
-        // http://php.net/manual/en/datetime.formats.php
+        // https://php.net/datetime.formats
         if (\is_string($comparedValue)) {
             if ($value instanceof \DateTimeImmutable) {
                 // If $value is immutable, convert the compared value to a

Constraints/RangeValidator.php

@@ -48,7 +48,7 @@ public function validate($value, Constraint $constraint)
         // Convert strings to DateTimes if comparing another DateTime
         // This allows to compare with any date/time value supported by
         // the DateTime constructor:
-        // http://php.net/manual/en/datetime.formats.php
+        // https://php.net/datetime.formats
         if ($value instanceof \DateTimeInterface) {
             if (\is_string($min)) {
                 $min = new \DateTime($min);

Tests/Constraints/IpValidatorTest.php

@@ -351,7 +351,7 @@ public function getInvalidReservedIpsV6()
     {
         // Quoting after official filter documentation:
         // "FILTER_FLAG_NO_RES_RANGE = This flag does not apply to IPv6 addresses."
-        // Full description: http://php.net/manual/en/filter.filters.flags.php
+        // Full description: https://php.net/filter.filters.flags
         return $this->getInvalidIpsV6();
     }