Update to 9.11.8
    
    Contains:
    5244.	[security]	Fixed a race condition in dns_dispatch_getnext()
    			that could cause an assertion failure if a
    			significant number of incoming packets were
    			rejected. (CVE-2019-6471) [GL #942]
    
    5241.	[bug]		Fix Ed448 private and public key ASN.1 prefix blobs.
    			[GL #225]
    
    5237.	[bug]		Recurse to find the root server list with 'dig +trace'.
    			[GL #1028]