This reverts commit b55602b0

- userhosts software is required by scalability test infrastructure to solve DNS of frontend urls

Add modules to manage user-password protection for local files against http requests

If provided, shows instance name value in the title, so it is easier to track
and relate shellinabox with a webrunner.

/reviewed-on nexedi/slapos!295

@kazuhiko @arnau This reverts commit bf7c13c6.

/reviewed-on !296

This should fix the error below to run zope.

Error: invalid literal for int() with base 10: '10m' (line 39, in file:///srv/slapgrid/slappart7/srv/testnode/awf/inst/test0-7/etc/zope-0.conf)

Make it possible to specify the desired threshold before a requests gets saved to a temporary file instead of being read completely into memory.

@nexedi, tests do pass (I squashed commits) so unless objections today I merge it tomorrow.

https://nexedi.erp5.net/test_result_module/20180216-696E64EA

/reviewed-on !290