[HttpKernel] use static late binding when dumping out container
raising delta on stopwatch as travis really breaks with less than 35
minor #9698 [Stopwatch] raising delta on stopwatch as travis really breaks with less than 35 (cordoval)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #9698).

Discussion
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[Stopwatch] raising delta on stopwatch as travis really breaks with less than 35

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | well many failing so far because of travis
| License       | MIT
| Doc PR        | no way

Commits
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3348c6a raising delta on stopwatch as travis really breaks with less than 35
minor #9678 [HttpKernel] use static late binding when dumping out container (tgabi333)

This PR was submitted for the 2.2 branch but it was merged into the 2.3 branch instead (closes #9678).

Discussion
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[HttpKernel] use static late binding when dumping out container

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no?
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |  #9649
| License       | MIT
| Doc PR        |

This PR gives the ability to override the stripComments method in descendants (and to disable the memory-eater container whitespace stripping)

Commits
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2e241cc [HttpKernel] use static late binding when dumping out container
[FrameworkBundle] Allowed "0" as a checkbox value in the php template.
bug #9711 [FrameworkBundle] Allowed "0" as a checkbox value in php templates (jakzal)

This PR was merged into the 2.3 branch.

Discussion
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[FrameworkBundle] Allowed "0" as a checkbox value in php templates

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8251
| License       | MIT
| Doc PR        |

Commits
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955e8cf [FrameworkBundle] Allowed "0" as a checkbox value in the php template.
Reset the box model to content-box in the web debug toolbar

This makes the styles compatible with CSS frameworks changing the box
model to box-sizing using a universal selector (Bootstrap 3 for instance).
bug #9716 Reset the box model to content-box in the web debug toolbar (stof)

This PR was merged into the 2.3 branch.

Discussion
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Reset the box model to content-box in the web debug toolbar

| 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

This makes the styles compatible with CSS frameworks changing the box model to box-sizing using a universal selector (Bootstrap 3 for instance).

Commits
-------

ae95a71 Reset the box model to content-box in the web debug toolbar