Disallow abstract definitions from doctrine event listener registration
[YAML] resolve variables in inlined YAML
added useful reminder about form.vars.errors into UPGRADE-2.5 notes
minor #11619 added useful reminder about form.vars.errors into UPGRADE-2.5 notes (Oleg Andreyev)

This PR was submitted for the master branch but it was merged into the 2.5 branch instead (closes #11619).

Discussion
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added useful reminder about form.vars.errors into UPGRADE-2.5 notes

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

PR is just about upgrading UPGRADE-2.5 notes.
We've been upgrading from 2.4 to 2.5.3 and missing this part (upgrading templates)

Commits
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aefb1ca added useful reminder about form.vars.errors into UPGRADE-2.5 notes
Remove hard dependency of RequestContext in AssetsExtension
[Validator] Fixed wrong translation keys/messages for Collection constraint. The error messages for a missing field and an unexpected field did not match the Contraint class
[CssSelector] Fix URL to SimonSapin/cssselect repo
minor #11779 [CssSelector] Fix URL to SimonSapin/cssselect repo in README (jwpage)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11779).

Discussion
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[CssSelector] Fix URL to SimonSapin/cssselect repo in README

This fixes a broken link in the CssSelector README spotted by @philsturgeon in https://github.com/symfony/CssSelector/pull/2.

| Q             | A
| ------------- | ---
| Fixed tickets | none
| License       | MIT

Commits
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b9a237c [CssSelector] Fix URL to SimonSapin/cssselect repo
bug #11778 [Validator] Fixed wrong translations for Collection constraints (samicemalone)

This PR was merged into the 2.3 branch.

Discussion
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[Validator] Fixed wrong translations for Collection constraints

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11630
| License       | MIT
| Doc PR        |

The error messages for a missing field and an unexpected field did not match the Constraint class.

Commits
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808de2b [Validator] Fixed wrong translation keys/messages for Collection constraint. The error messages for a missing field and an unexpected field did not match the Contraint class
Fixed Factory services not within the ServiceReferenceGraph.
bug #11639 [DependencyInjection] Fixed factory service not within the ServiceReferenceGraph. (boekkooi)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11639).

Discussion
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[DependencyInjection] Fixed factory service not within the ServiceReferenceGraph.

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

Fixed a problem where Factory services are not added to the ServiceReferenceGraph.

Commits
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e992f8e Fixed Factory services not within the ServiceReferenceGraph.
[Validator] reverted permissions change on translation files
bug #11677 [YAML] resolve variables in inlined YAML (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[YAML] resolve variables in inlined YAML

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11665
| License       | MIT
| Doc PR        |

#11569 does not resolve variables in inline YAML.

Commits
-------

45a5863 [YAML] resolve variables in inlined YAML
[Filesystem Component] mkdir race condition fix #11626
bug #11726 [Filesystem Component] mkdir race condition fix #11626 (kcassam)

This PR was squashed before being merged into the 2.3 branch (closes #11726).

Discussion
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[Filesystem Component] mkdir race condition fix #11626

[Filesystem Component] Fix mkdir race condition

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11626
| License       | MIT
| Doc PR        | none

Commits
-------

0483452 [Filesystem Component] mkdir race condition fix #11626
bug #11749 [TwigBundle] Remove hard dependency of RequestContext in AssetsExtension (pgodel)

This PR was merged into the 2.5 branch.

Discussion
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[TwigBundle] Remove hard dependency of RequestContext in AssetsExtension

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11466
| License       | MIT
| Doc PR        | -

symfony/symfony#10451 introduced the requirement of RequestContext in AssetsExtension. This is only needed when generating absolute URLs for assets. When sending emails with Twig from the CLI, the router may not be present and most times is not required.

This PR attempts to remove the hard dependency and set RequestContext if the router is present according to issue #11466.

Commits
-------

5ad4d8a Remove hard dependency of RequestContext in AssetsExtension
[Validator] Pass strict argument into the strict email validator
bug #11739 [Validator] Pass strict argument into the strict email validator (brianfreytag)

This PR was submitted for the master branch but it was merged into the 2.5 branch instead (closes #11739).

Discussion
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[Validator] Pass strict argument into the strict email validator

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11722, #11719
| License       | MIT
| Doc PR        | none

When strict = true is set in the Email constraint, it loads up the third
party library to do strict validation, but it doesn't pass strict into
the library. Unless strict is passed into the library, only major e-mail
errors will be validated and e-mails like user@gmail ,com or
user@gmail,com will pass validation because they are registered as
warnings by the library and not errors.

/cc @egulias @stof

Commits
-------

d2a634d [Validator] Pass strict argument into the strict email validator
Added fixture to test parsing of hash keys ending with a space and #
[Yaml] fixed mapping keys containing a quoted #