[libmicrohttpd] upgraded connections remain suspended when using MHD_USE_THREAD_PER_CONNECTION

[Dom F]

Hello,

I start the daemon with these flags:
MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG | MHD_USE_POLL | 
MHD_USE_ITC | MHD_USE_INTERNAL_POLLING_THREAD | MHD_ALLOW_UPGRADE

When I'm finished with an upgraded connection I call:
MHD_upgrade_action(urh, MHD_UPGRADE_ACTION_CLOSE)

This leaves urh->was_closed and urh->clean_ready as true and returns 
MHD_YES.

MHD_upgrade_action() also calls MHD_resume_connection() but 
resume_suspended_connections() in daemon.c is never called.

So upgraded connections add to daemon->suspended_connections_tail and 
daemon->connections increases until it hits daemon->connection_limit 
then my application starts reporting this:

Server reached connection limit. Closing inbound connection.

Anyone else seeing the same?

Dom