[Validator] fixed Boolean handling in XML constraint mappings (closes #5603)
merged branch fabpot/validator-xml-loader (PR #8831)

This PR was merged into the 2.2 branch.

Discussion
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[Validator] fixed Boolean handling in XML constraint mappings

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #5603
| License       | MIT
| Doc PR        | n/a

ping @bschussek

Commits
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33b0a17 [Validator] fixed Boolean handling in XML constraint mappings (closes #5603)
[Yaml] fixed embedded folded string parsing
merged branch jfsimon/issue-8472 (PR #8841)

This PR was merged into the 2.2 branch.

Discussion
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[Yaml] fixed embedded folded string parsing

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8779

Commits
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566d79c [Yaml] fixed embedded folded string parsing
[Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed
[Locale] Fixed: Locale::setDefault() throws no exception when "en" is passed

Conflicts:
	src/Symfony/Component/Locale/Stub/StubLocale.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
merged branch bschussek/fix-locale-2.2 (PR #8846)

This PR was merged into the 2.2 branch.

Discussion
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[2.2][Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed

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

This is necessary to fix `IntlTestHelper::requireIntl()` when ICU is not installed and the Icu component 1.0.0 is used instead. In that case, `IntlTestHelper::requireIntl()` calls `\Locale::setDefault('en')` and fails. Consequently, the Form component test cases are partially red when running without ICU installed.

This PR fixes that.

Commits
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d0faf55 [Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed
Merge branch '2.2' into 2.3

* 2.2:
  [Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed
  [Yaml] fixed embedded folded string parsing
  [Validator] fixed Boolean handling in XML constraint mappings (closes #5603)

Conflicts:
	src/Symfony/Component/Locale/Stub/StubLocale.php
	src/Symfony/Component/Locale/Tests/Stub/StubLocaleTest.php
merged branch bschussek/fix-locale-2.3 (PR #8847)

This PR was merged into the 2.3 branch.

Discussion
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[2.3][Locale] Fixed: StubLocale::setDefault() throws no exception when "en" is passed

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

Same as #8846 for 2.3+.

Commits
-------

e1f40f2 [Locale] Fixed: Locale::setDefault() throws no exception when "en" is passed