Projects API: cannot filter for disabled features

Summary

As discussed in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12724#note_54688768, there is currently no way to specifically filter for disabled features (i.e. with_issues_enabled=false, applicable to all params). I am not sure if this applies to any API, I just noticed while working on the Merge Request from before, so it might make sense to check if the current behaviour is indeed the expected behaviour.

Steps to reproduce

curl 'https://gitlab.com/api/v4/projects?with_issues_enables=false&order_by=name&per_page=5'

What is the current bug behavior?

The filter does not get applied and returns projects with the feature enabled

What is the expected correct behavior?

It should only return projects with the feature disabled.

Possible fixes

https://gitlab.com/gitlab-org/gitlab-ce/blob/master/lib/api/projects.rb#L79

it would need to include handling for the parameter being false explicitly and filter accordingly.