[Debug] expose object_handle
[FrameworkBundle] container:debug : list services if no service match exacly the name argument

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11303
| License       | MIT
| Doc PR        |

If we launch the command "container:debug log" and there is no
service nammed log, it will print something like this :

```
[0] logger
[1] monolog.handler.console
[2] monolog.handler.debug
```

After the service has been chosen, usual container:debug informations
are displayed.
feature #12061 [Debug] expose object_handle (nicolas-grekas)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[Debug] expose object_handle

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

This is a small enhancement to the symfony debug C extension that allows fetching an object's handle.
This is the `#number` as displayed by var_dump():
`class stdClass**#1** (0) {}`

This is required for VarDumper to be able to expose objects' handles and thus have more precise dumps.
It will allow inspecting "same" relationships between two *different* dumps.

Commits
-------

5f6b676 [Debug] expose object_handle
feature #11339 [FrameworkBundle] container:debug : list services if no service match exacly the name argument (agallou)

This PR was merged into the 2.6-dev branch.

Discussion
----------

[FrameworkBundle] container:debug : list services if no service match exacly the name argument

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11303
| License       | MIT
| Doc PR        |

If we launch the command "container:debug log" and there is no
service nammed log, it will print something like this :

```
[0] logger
[1] monolog.handler.console
[2] monolog.handler.debug
```

After the service has been chosen, usual container:debug informations
are displayed.

Commits
-------

16201b6 [FrameworkBundle] container:debug : list services if no service match exacly the name argument