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

[Andrew Cagney]

New commits:
commit 491410444efd19007bf4dacbe91266833957be50
Author: Andrew Cagney <cagney at gnu.org>
Date:   Sun Jun 14 20:30:49 2020 -0400

    ip: cleanup ttorange(); add more tests
    
    - mark as MUST_USE_RESULT, fix whack bug
    - reject ports vis: ::1/128:0
    - don't rely on ttosubnet() / drop logger parameter
    - allow ipv4 subnets