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

[Andrew Cagney]

New commits:
commit 3616425a526ae810c03c9dcbc16905abc185a48b
Author: Andrew Cagney <cagney at gnu.org>
Date:   Thu Aug 12 16:40:22 2021 -0400

    connections: in delete_every_connection() delete new-to-old
    
    Use prev_connection() to iterate over connections new-to-old when
    deleting (presumably a connection instance is newer than its
    template and will be deleted first).
    
    Note: this function goes from O(connections) to (O(connections)^2)/2.
    Fortunately that only happens during shutdown.  The problem is
    the single-linked-list CONNECTIONS, and that needs deleting.
    
    Fix #491 delete all connections during shutdown triggers use after free

commit f3df1baaa7e84bd0f1894db514adac1fb44370ed
Author: Andrew Cagney <cagney at gnu.org>
Date:   Thu Aug 12 16:40:22 2021 -0400

    connections: add {next,prev}_connection()
    
    For iterating over connections.
    Deleting the current connection mid-loop is allowed.
    
    Also update next_state() so it's interface is similar.