bug #10348 Update FileLoader to fix issue #10339 (msumme)

This PR was merged into the 2.3 branch.

Discussion
----------

Update FileLoader to fix issue #10339

This fixes an issue in Symfony\Component\Config\Loader\FileLoader

| Q             | A
| ------------- | ---
| Bug fix?      |  yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |  #10339
| License       | MIT
| Doc PR        |  none

Commits
-------

3988728 Update FileLoader to fix issue #10339
added a BC comment
Improves the readability of the collected arrays in the profiler.
fixed Kernel::stripComments() normalizing new-lines

This makes normalizing new-lines less error-prone
when a string contains multiple new line-lines
[HttpKernel] tweaked value exporter
bug #10351 [HttpKernel] fix stripComments() normalizing new-lines (sstok)

This PR was merged into the 2.3 branch.

Discussion
----------

[HttpKernel] fix stripComments() normalizing new-lines

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #10227
| License       | MIT
| Doc PR        |

This makes normalizing new-lines less error-prone
when a string contains multiple new line-lines

Commits
-------

63032c7 fixed Kernel::stripComments() normalizing new-lines
bug #10284 [2.4][HttpKernel] Fix issue #10209 (stephpy)

This PR was merged into the 2.4 branch.

Discussion
----------

[2.4][HttpKernel] Fix issue #10209

When the profiler has `only_exception` option activated and a subrequest which
throw an exception, the parent profile cannot be found.

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

Fix issue #10209

Commits
-------

b949c49 [2.4][HttpKernel] Fix issue #10209 When the profiler has `only_exception` option activated and a subrequest throw an exception, the parent profile cannot be found.
Create ExceptionHandlerInterface to allow third party exception handlers' to handle fatal errors
feature #10353 [Debug] ExceptionHandlerInterface to allow third party exception handlers to handle fatal errors caught by ErrorHandler (FineWolf)

This PR was merged into the 2.5-dev branch.

Discussion
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[Debug] ExceptionHandlerInterface to allow third party exception handlers to handle fatal errors caught by ErrorHandler

| Q             | A
| ------------- | ---
| Bug fix?      | yes (other project)
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| Related tickets | schmittjoh/JMSDebuggingBundle#68
| License       | MIT
| Doc PR        |

The current `ErrorHandler` is extremely strict on how it selects whether to run an `ExceptionHandler` when an `E_FATAL` occurs.

This modification allows any class that implements `ExceptionHandlerInterface` to handle a `FatalErrorException` created by the `ErrorHandler`.

Commits
-------

15d063b Create ExceptionHandlerInterface to allow third party exception handlers' to handle fatal errors
removed as many usage of the request service as possible without breaking BC
feature #10354 removed as many usage of the request service as possible without breaking BC (fabpot)

This PR was merged into the 2.5-dev branch.

Discussion
----------

removed as many usage of the request service as possible without breaking BC

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

Commits
-------

d638369 removed as many usage of the request service as possible without breaking BC
removed double-stringification of values in the profiler
feature #10352 [DataCollector] Improves the readability of the collected arrays in the profiler (fabpot)

This PR was merged into the 2.5-dev branch.

Discussion
----------

[DataCollector] Improves the readability of the collected arrays in the profiler

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

This PR is based on #10155.

Original description:

It simply improves the readability of the collected arrays in the profiler:

__before__:
```
Array(date => Array(year => , month => , day => ), time => Array(hour => ))
```

__after__:
```
[
  date => [
      year => ,
      month => ,
      day =>
  ],
  time => [
      hour =>
  ]
]
```

Commits
-------

dce66c9 removed double-stringification of values in the profiler
1cda2d4 [HttpKernel] tweaked value exporter
3f297ea Improves the readability of the collected arrays in the profiler.
[Console] added ProgressBar (to replace the stateful ProgressHelper class)
[Console] refactored the progress bar to allow placeholder to be extensible
[Console] added more default placeholder formatters for the progress bar
[Console] added support for multiline formats in ProgressBar
[Console] added a way to add a custom message on a progress bar
[Console] added a way to globally add a progress bar format or modify a built-in one
[Console] fixed PHP comptability