Revert "MEDIUM: queue: move the queue lock manipulation to pendconn_process_next_strm()"

This reverts commit 9a6d0ddbd6788a05c6730bf0e9e8550d7c5b11aa.

The recent changes since 5304669e1 MEDIUM: queue: make
pendconn_process_next_strm() only return the pendconn opened a tiny race
condition between stream_free() and process_srv_queue(), as the pendconn
is accessed outside of the lock, possibly while it's being freed. A
different approach is required.
1 file changed