Fix bug in package.mask reason check. Remove old.

(Portage version: 2.2.10/cvs/Linux x86_64, signed Manifest commit with key B576E4E3)
security bump, bug 523652 ; removed old

(Portage version: 2.2.8-r1/cvs/Linux x86_64, signed Manifest commit with key 2B6559ED)