Tunnels timing out in 2016.74

[Jim Orton]

Hi,

I've been using Dropbear for many years to establish tunnels to a relay 
server.  I recently updated my Linux server which upgraded Dropbear from 
2015.67 to 2016.74.  Now all connections to the server drop after the 
idle_timeout period set by the -I parameter.  All clients use dbclient 
and initiate the tunnel with a -K keep-alive value set to about 1/3 the 
idle_timeout, which in 2015.67 (and 2013.60 before that) would keep the 
tunnel alive, even if unused, until manually killed.

dropbear server parameters:
     dropbear -p 1234 -w -a -I 650

dbclient call:
     dbclient user at server -p 1234 -R 54321:localhost:2345 -K 200 -g -f 
-N -i ~/.ssh/id_rsa


I don't see anything in the release notes  that would seem to affect 
these setting.   What am I missing?  Unfortunately there is no simple 
downgrade of Dropbear in my server's package manager; I can build a 
downrev if necessary but hope to avoid that if this is just a subtle 
change in the parameter handling.

Thanks!
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