[Security][Acl] Issue #5787 : Added MutableAclProvider::deleteSecurityIdentity

Code style fix and documentation typo
remove deprecated constraints calls (Min, Max, MaxLength, MinLength)
[Form] Fixed memory leak in FormValidator
[Console] make parent constructor test more reliable

it also fixes the test since f2b60e9c687 and improves phpdoc
[Console] improve regex performance to validate name

using possesive quantifier
Set the font-weight for links to 'normal', to prevent ugly bold links.
[Intl] make currency bundle merge fallback locales when accessing data, allowing use of country-specific locales
Fix finder date constraints and tests
[Routing] added working test case for issue #5135
[DomCrawler] [HttpFoundation] Make `Content-Type` attributes identification case-insensitive
bug #9378 [DomCrawler] [HttpFoundation] Make `Content-Type` attributes identification case-insensitive (matthieuprat)

This PR was merged into the 2.2 branch.

Discussion
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[DomCrawler] [HttpFoundation] Make `Content-Type` attributes identification case-insensitive

According to [section 3.7 of RFC 2616][], media-type attribute names in the `Content-Type` header are case-insensitive.
Therefore, identification of the `text` type and the `charset` parameter in the `Content-Type` header should be case-insensitive.

[section 3.7 of RFC 2616]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7

Commits
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17a2d66 [DomCrawler] [HttpFoundation] Make `Content-Type` attributes identification case-insensitive
[Form] Fixed: The "data" option is taken into account even if it is NULL
[FrameworkBundle] Update deprecation message

Small addition to (doc string only):
https://github.com/symfony/symfony/pull/9252
Fixed the error handling when decoding invalid XML to avoid a Warning
bug #9391 [Serializer] Fixed the error handling when decoding invalid XML to avoid a Warning (stof)

This PR was merged into the 2.2 branch.

Discussion
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[Serializer] Fixed the error handling when decoding invalid XML to avoid a Warning

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Without the exception being thrown here, the call to ``simplexml_import_dom`` throws a warning saying ``Invalid Nodetype to import``.
This has been reported by @Tobion after we refactored FOSRestBundle to use this XmlEncoder instead of a duplication of a previous version of the class: https://github.com/FriendsOfSymfony/FOSRestBundle/pull/583/files#r7221045

Commits
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b2550b9 Fixed the error handling when decoding invalid XML to avoid a Warning
bug #9388 [Form] Fixed: The "data" option is taken into account even if it is NULL (bschussek)

This PR was merged into the 2.2 branch.

Discussion
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[Form] Fixed: The "data" option is taken into account even if it is NULL

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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c1a3eb3 [Form] Fixed: The "data" option is taken into account even if it is NULL
[HttpKernel] fixed memory limit display in MemoryDataCollector
bug #9395 [HttpKernel] fixed memory limit display in MemoryDataCollector (hhamon)

This PR was merged into the 2.3 branch.

Discussion
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[HttpKernel] fixed memory limit display in MemoryDataCollector

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| License       | MIT
| Doc PR        | ~

Commits
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644f78d [HttpKernel] fixed memory limit display in MemoryDataCollector
Fix nonexistent key id in twig of data collector
bug #9397 [BUG][Form] Fix nonexistent key id in twig of data collector (francoispluchino)

This PR was merged into the master branch.

Discussion
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[BUG][Form] Fix nonexistent key id in twig of data collector

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

When you create a single button form type, the id of data collector does not exist. It's caused by the PR #9394.

Commits
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19c74f3 Fix nonexistent key id in twig of data collector