Every role is trusted

Problem/Motivation

The function security_review_trusted_roles() returns every role as trusted.

Proposed resolution

The problem comes from using the values (role names) of the security_review_untrusted_roles() function's return value instead of the keys (role IDs) in the SQL query.
Applying array_keys() on the $untrusted_roles array solves the problem.

Remaining tasks

Review, commit.

User interface changes

None.

API changes

None.