I've been having issues with basic DHCP functionality on recent
releases (since around 1.22).  What I see is, most of the time, I lose
my IP address during each DHCP lease expiration.  Then immediately I
get either my same IP again, or sometimes my DHCP server gives me a
different IP address.  If I do end up getting a new IP address, many
operations on my machine become very slow.

So, I tracked down the root cause of the IP address re-acquisition,
which is actually due to two significant bugs.  I'll be sending in
patches for those very soon.

The slowness is due to broken DNS resolution, with each DNS lookup
timing out if I use the connman DNS proxy.  So, it appears that
connman's DNS proxy breaks if we lose our DHCPv4 IP address
assignment.  Is this a know issue?  Has anybody else seen this before?

-Justin
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