backport mod_reqtimeout with handshake support

[Jesse Williamson]

While mod_reqtimeout has been present since 2.2.15, the handshake parameter to RequestReadTimeout
was not added until 2.4.39.

The attached patch is for apache2_2.4.18-2ubuntu3.10 (Xenial), and will need to be backported to other versions.

[Christian Ehrhardt  (paelzer)]

This looks like a feature request to me, is there a bug that would make this SRUable since you added a xenial diff?

Further it is quite some code and due to that more regression risk - so without a broken use case that will be hard.

I'd ask you to provide a full SRU template [1] before going on with it.

[Jesse Williamson (chardan)]

Hi Christian, I think I have jumped the gun here process-wise-- my apologies. I didn't realize that attaching the patchfile would trigger notifications. This is not yet ready for SRU, I'll be making revisions, please do not use. Sorry for the confusion!

[Bryce Harrington (bryce)]

Hi Jesse, per your comment that the debdiff is WIP, I'm going to close this bug out as invalid. Please feel free to reopen when it's ready for others to look at, or go ahead and file a new bug report if you'd prefer a clean start. I'd echo what Christian said - the SRU process is stringent for changes, so keeping changes to a minimum will aid in making reviewing easier, and thus makes the SRU process move swifter. He's also right that SRUs are more geared towards addressing severe bugs, rather than new features.

In case Christian's link to the SRU process didn't make it through, here it is again:
  https://wiki.ubuntu.com/StableReleaseUpdates

Offhand, in looking at what versions we're carrying I see ubuntu is still carrying 2.4.38 in eoan, so perhaps a next action would be moving to 2.4.39.

[Bryce Harrington (bryce)]

Jesse, I've filed LP: #1834359 and subscribed you, for trying to get 2.4.39 into eoan. Since that may require jumping ahead of debian, rationale about the benefits may help with the justification, so your input would be welcome.