{
    # Obsolete the aliasing of ppp module name if we find it
    # We no longer need to use the alias, we use a module
    # search path instead
    @lines = grep { !/^alias ppp ppp-4mppe$/ } @lines;
    foreach my $line
	(
	    "alias ppp ppp_generic",
	    "alias char-major-108 ppp",
	    "alias /dev/ppp ppp",
	    "alias tty-ldisc-3 ppp_async",
	    "alias tty-ldisc-14 ppp_synctty",
	)
    {
	unless (exists $lines{$line})
	{
	    push @lines, $line;
	}
    }
    "";
}
