Display "Employee" as hyperlink (if user has permission)

When viewing/editing an absence-request, the "Employee" name is displayed. This name should be a hyperlink – but only if the current user has to permission to view the employee's record.

As a couple examples of different use-cases:

• An employee may have permission to view his absence-requests but not to view his full contact record.
• A high-level manager may have permission to view all absence-requests and all contact records
• A mid-level manager may have permission to view absence-requests for people on his team. She may or may not have permission to view the full contact record (depending the org's policy and ACL configuration).

There may be a suitable helper in CRM_ACL_API, CRM_ACL_BAO_ACL, or CRM_Core_Permission.