[Console] fixed input bug when the value of an option is empty (closes #6649, closes #6689)
[Process] Fix docblocks, remove `return` from `PhpProcess#start()` as parent returns nothing, cleaned up `ExecutableFinder`
merged branch stloyd/bugfix/process_phpdocs (PR #6626)

This PR was merged into the 2.1 branch.

Commits
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a62e04f [Process] Fix docblocks, remove `return` from `PhpProcess#start()` as parent returns nothing, cleaned up `ExecutableFinder`

Discussion
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[2.1][Process] Fix docblocks, remove `return` from `PhpProcess#start()`
fixed CS
added a way to enable/disable PHP support when parsing a YAML input via Yaml::parse()

PHP support when parsing a file has been disabled by default.
If you do need PHP support when parsing a YAML file, enable it via:

    Yaml::setPhpParsing(true);

As of Symfony 2.1, PHP support is disabled by default, and support will
be removed in Symfony 2.3.
added a way to enable/disable object support when parsing/dumping

By default, object support is disabled, and instead of throwing an
exception when an object is handled, null is returned.

If you do need object support, enable it via:

    Yaml::dump($data, false, true);

If you want an exception to be thrown in case an invalid type is handled
(a PHP resource or a PHP object), pass true as the second argument:

    Yaml::dump($data, true, true);

The same can be done when parsing:

    Yaml::parse($data, 2, false, true);
Added Yaml\Dumper::setIndentation() method to allow a custom indentation level of nested nodes.

YAML does not specify an absolute indentation level, but a consistent indentation of nested nodes only: http://www.yaml.org/spec/1.2/spec.html#space/indentation/

Projects that are generally using 2 spaces for indentation should be able to retain consistency with their coding standards by supplying a custom value for the new $indent parameter added to Yaml::dump(), or the new Dumper::setIndentation() method.

The new parameter is a backwards-compatible API addition and defaults to the previous default of 4 (which was changed from 2 via PR #2242 only recently).

Conflicts:
	src/Symfony/Component/Yaml/Dumper.php
	src/Symfony/Component/Yaml/Yaml.php
[Yaml] fixed default value
Merge branch '2.0' into 2.1

* 2.0:
  [Yaml] fixed default value
  Added Yaml\Dumper::setIndentation() method to allow a custom indentation level of nested nodes.
  added a way to enable/disable object support when parsing/dumping
  added a way to enable/disable PHP support when parsing a YAML input via Yaml::parse()
  [Console] fixed input bug when the value of an option is empty (closes #6649, closes #6689)

Conflicts:
	src/Symfony/Component/Yaml/Dumper.php
	src/Symfony/Component/Yaml/Parser.php
	src/Symfony/Component/Yaml/Tests/DumperTest.php
	src/Symfony/Component/Yaml/Tests/ParserTest.php
	src/Symfony/Component/Yaml/Yaml.php
updated CHANGELOG for 2.0.22
update CONTRIBUTORS for 2.0.22
updated VERSION for 2.0.22
updated CHANGELOG for 2.1.7
updated VERSION for 2.1.7
[Yaml] fixed typo
[DependencyInjection] fixed a bug in the YAML dumper where references where not converted to the @ notation
[Yaml] fixed unneeded BC break
Merge branch '2.0' into 2.1

* 2.0:
  [Yaml] fixed unneeded BC break
  [DependencyInjection] fixed a bug in the YAML dumper where references where not converted to the @ notation
  [Yaml] fixed typo
  updated VERSION for 2.0.22
  update CONTRIBUTORS for 2.0.22
  updated CHANGELOG for 2.0.22

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php
bumped Symfony version to 2.1.8-DEV
KNOWN_ISSUES with php 5.3.16