* 2.1:
Fix default value handling for multi-value options
[HttpKernel] truncate profiler token to 6 chars (see #7665)
Disabled APC on Travis for PHP 5.5+ as it is not available
[HttpFoundation] do not use server variable PATH_INFO because it is already decoded and thus symfony is fragile to double encoding of the path
[Yaml] improved boolean naming ($notEOF -> !$EOF)
[Yaml] fixed handling an empty value
[Routing][XML Loader] Add a possibility to set a default value to null
The /e modifier for preg_replace() is deprecated in PHP 5.5; replace with preg_replace_callback()
[HttpFoundation] Fixed bug in key searching for NamespacedAttributeBag
[Form] DateTimeToRfc3339Transformer use proper transformation exteption in reverse transformation
Update PhpEngine.php
[HttpFoundation] getClientIp is fixed.
Conflicts:
.travis.yml
src/Symfony/Component/Routing/Loader/XmlFileLoader.php
src/Symfony/Component/Routing/Loader/schema/routing/routing-1.0.xsd
src/Symfony/Component/Routing/Tests/Fixtures/validpattern.xml
src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
Fixed a bug in NamespacedAttributeBag causing a result to be falsely found when
the last key of the attribute matched the last of the queried name regardless of
if the key did not exist in the search.
Added Tests to demonstrate the issue and resolved by setting keys to null when
iterating through query and returning proper responses in the case that the
given array does in fact not exist.
* Updated Syntax of null checks
* Fixing missing else case for if statement in write context
