Remove global opencl USE flag because it needs fglrx or nvidia binary driver.
Use flag acl depends on upcall support (cifs).
For KDE 4.11 the semantic-desktop USE flag will be removed and the support is enabled (fix). Now it is necessary for some packages.
We could not use gcrypt and openssl support at the same time.
Mask the openrc USE flag globally.
Unmask the systemd USE flag globally.
Mask the openrc package.
Simulate an installed openrc package.
Disable ACPI daemon support for binary nvidia driver.