Update LICENSE to 2017

Add full stop to all command descriptions

Fix Xdebug warning

Composer incorrectly shows Xdebug warning, even if extension is not loaded, but COMPOSER_ALLOW_XDEBUG is present.

This can happen if an identifier doesn’t have a composer.json file (but other identifiers do)

Fix scanned ini files logic

Refactor the validation of inline package definitions

Reusing the root schema was a mistake, because the root schema does
not have the dist and source properties (which are populated by repository
objects).

Update the branch alias for master

Loosen the validation for the URL field of VCS repositories

The URL of the VCS repository may not match the uri pattern of the JSON
schema spec, for instance when using a SSH URL of the repository.

Fix php.net HTTPS links; always use HTTPS for getcomposer.org

Add missing definition of a property

Fix the validation of required properties for inline packages

Update memory limit in docs

As per 0bc75c3f

Implement schema validation for repositories

Ignore xdebug.ini and process all files, #5995