[Swan-commit] Changes to ref refs/heads/main

[Andrew Cagney]

New commits:
commit 39591724ce0c84ce2656df52fad8a4d410c5a446
Author: Andrew Cagney <cagney at gnu.org>
Date:   Mon May 10 11:12:19 2021 -0400

    testing: update ipcheck
    
    - make the --dns option manditory; change syntax to
         --dns={no,hosts-file,yes}
      (looking up localhost works when there is no DNS)
    - don't lookup localhost6 - non portable
    - split numeric and non-numeric lookups
    - try 0, 4, and 6 on all numeric addresses
    - skip DNS lookups when numeric address is invalid
    - skip DNS lookups when name requires DNS
    - check for memory leaks
    
    change check-01 to run: ipcheck --dns=hosts-file