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

[Andrew Cagney]

New commits:
commit 41a8765850d20f1e063e6112f011afc19f94a4ce
Author: Andrew Cagney <cagney at gnu.org>
Date:   Wed Nov 9 20:25:50 2022 -0500

    ddns: drop code trying to initiate same-in-some-sense connections
    
    I'm guessing that the intent was to avoid duplicate blocking calls to
    ttoaddress_dns() by finding other connections waiting for the same DNS
    name.  Except it was using a nested loop iterating over host-pairs.
    
    If performance really is a concern (I don't think it is):
    
    - replace the all-connections loop with a dns-name <=> connection map
    
    - use nonblocking unbound