Disallow abstract definitions from doctrine event listener registration
[HttpFoundation] Update QUERY_STRING when overrideGlobals
[WebProfilerBundle] Fixed double height of canvas
[Validator] Convert objects to string in comparison validators. Reapplies 6cf5e0812e6f20d60acbc0324abf96475e89b6ef
[Process] Added process synchronization to the incremental output tests

The tests currently fail from time to time if the executing machine is under
heavy load. This leads to false negatives on Travis CI.

A side effect of the change is that the tests are much faster now.
[Form] allowed CallbackTransformer to use callable
minor #11576 [Form] allowed CallbackTransformer to use callable (issei-m)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11576).

Discussion
----------

[Form] allowed CallbackTransformer to use callable

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

I want to use the callable(i.e. inner class methods) in CallbackTransformer, but its current constructor is defined argument type hinting for \Closure so i can't.

Commits
-------

e77022b [Form] allowed CallbackTransformer to use callable
fix shell command injection
add way to test command under windows
change command to which available under most unix systems

agree i will change it which is available under suse, ubuntu, debian, fedora, bsd
bug #11598 [Finder] Shell escape and windows support (Gordon Franke, gimler)

This PR was merged into the 2.3 branch.

Discussion
----------

[Finder] Shell escape and windows support

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

Add escaping of command passed to Shell::testCommand().
Fix todo add support for windows.

Commits
-------

c70a226 change command to which available under most unix systems
85e77b1 add way to test command under windows
4fa9288 fix shell command injection
minor #11565 [Process] Added process synchronization to the incremental output tests (webmozart)

This PR was merged into the 2.3 branch.

Discussion
----------

[Process] Added process synchronization to the incremental output tests

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

The tests currently fail from time to time if the executing machine is under
heavy load. This leads to false negatives on Travis CI.

A side effect of the change is that the tests are much faster now.

Commits
-------

6dd3946 [Process] Added process synchronization to the incremental output tests
[Console] fixed style creation when providing an unknown tag option
remove volatile tests

Some tests relying on timings and external network resources were not
reliable and occasionally made builds on Travis fail.
return empty metadata collection if none do exist

The PropertyMetadataContainerInterface defines that the method
getPropertyMetadata() has to return an empty collection if no
metadata have been configured for the given property. Though, its
implementation in the ClassMetadata class didn't check for
existence of such metadata. This behavior led to unexpected PHP
notices when validating a property or a property value of a property
without any configured constraints (only affects the new 2.5 API).
Additionally, the getMemberMetadatas() didn't check for existing
array keys as well which has also been fixed.
[HttpKernel] added an analyze of environment parameters for built-in server.
bug #10914 [HttpKernel] added an analyze of environment parameters for built-in server (mauchede)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #10914).

Discussion
----------

[HttpKernel] added an analyze of environment parameters for built-in server

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | #10208
| License       | MIT
| Doc PR        | -

With the built-in server, it is not possible to use the external parameters: environment variables are only in `$_ENV`.

Commits
-------

696b978 [HttpKernel] added an analyze of environment parameters for built-in server.
[DomCrawler] fix the axes handling in a bc way

The previous fix in #11548 for handling XPath axes was not backward
compatible. In previous Symfony versions the Crawler handled nodes
by holding a "fake root node". This must be taken into account when
evaluating (relativizing) XPath expressions.
fix typos and syntax in Profiler controller method comments
minor #11605 [WebProfilerBundle] Fix typos and syntax in Profiler controller method comments (pgodel)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #11605).

Discussion
----------

[WebProfilerBundle] Fix typos and syntax in Profiler controller method comments

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

Commits
-------

be03b75 fix typos and syntax in Profiler controller method comments