Extend the socket callbacks in event to allow a timeout on the I/O callback. When a socket callback has a timeout, an associated timer event is used to remove the sockets from the pollset and call a timeout function. * This includes a noteworthy change to the main event loop. Previously, we would call epoll, then process the timer events, then iterate through the poll results. After this patch, the timer events are processed before the poll() a _non-queued_ action can change the pollset conents (a users timed callback function conversely could easily sit in a queue while the main thread continues down into epoll) * timer events can now have sockets associated with them, those sockets are removed from the pollset when the timer event fires w/o a queue to the worker. * timer events now have a canceled flag that can be toggled without locking the timer list. * Drop the severity of some wstunnel messages from DEBUG to TRACE1 * Lift the restriction on using asynchronous websockets connections but having an idle timeout

Remove MPM-private stuff from conn_state_t

Cleanup effort in prep for GA push: Trim trailing whitespace... no func change

Some improvements for handling of many connections for MPM event: - Process lingering close asynchronously instead of tying up worker threads (based on patch by Jeff Trawick). - If the number of connections of a process is above threads_per_child + WORKER_OVERCOMMIT * (idle_workers - 1) (WORKER_OVERCOMMIT is fixed at 2, at the moment), or if all workers are busy, don't accept new connections in that process. Such a dynamic connection limit is necessary because we may have both async and non-async (ssl) connections. WORKER_OVERCOMMIT should be a config option. - Don't count idle workers of not-accepting processes against MinSpareThreads, so that the parent will spawn new processes when necessary. - If we receive a keep-alive request while all workers are busy, don't block but close the connection immediately so that the client will re-connect to a different process. Related changes: - Log what is going on at trace loglevels. - Remove the bypass_push poll type flag, this code cannot be hit anymore (if it ever could?). - Add some macro helpers for dealing with timeout queues.

If MaxMemFree is set, limit the number of recycled pools that is kept

Revert an old (~10yr) change to the fd Q; move back to FIFO rather than LIFO, for more consistent performance so that older requests don't suffer

The Event MPM is no longer experimental; move it out of that ghetto. Yank the few bits that implement the concept of an experimental MPM.