Handle the case where too many retries are attempted, by returning
a 503 reply.

Fixes #1401
Fix some typos
Ensure present dependency on vsc_fields.h

Patch by: Federico Schwindt <fgsch@lodoss.net>
Reflect reality of generated files
Update copyright notice
Only match this on the root
Document changes for 3.0.5 rc
Changes for 3.0.5
Add missing dependency on rt
Clarify that this output isn't build critical
Some additional files from make check
Prepare for a 4.0-TP2 release
Add VCL 4.0 marker in default.vcl.

Fixes: #1413
Add changes 4.0.0TP1->TP2
Revert "Ensure present dependency on vsc_fields.h"

The dependency is defined as part of vsc2rst_SOURCES.
This reverts commit b1b777d.
obj.lastuse has been renamed to obj.last_use

Update vcl(7) and default.vcl
Remove comment that never should have been commited
Import fresh devicedetect.vcl
Remove Zope/Plone example VCL

We don't have a maintainer for this, and it hasn't been updated for a while.

In general we use the Wiki for linking to or referencing backend-specific
configuration.
Forgotten references to (deleted) zope-plone.vcl

Initial commit in b0d9950.

Thanks to Federico Schwindt for pointing this out.