useradd:
    most of the stuff it create with setfscreatecon except:
        user home dirs
        /etc/passwd.$RANDOMNUMBER
    it manages user mail spool files, so i created a user mail spool type
    common login users are currently only allowed to read it
    the idea is that later i might confile the mail program and then i
    might allow the mail programs to delete messages from the file
allow emacs to read user/session mail spool files