It does -X PUT + --data-binary @file.

It's available only on the slave, so it is not part of master partition
configuration.

Due to the cleanup change the parameter parsing logic has to be improved.

Improvements:

 * link from README to schemas
 * drop incorrect entries in README
 * improve entries description in README
 * make parameter description more understandable in SCHEMA

Instead of duplicating the versions and having an old pin to a version
which is now older than caucase minimum required version.

This reverts commit 16d90017
because new use of collective.recipe.template is forbidden.

use six for python3 compatibility

See merge request nexedi/slapos!914

See merge request nexedi/slapos!913

Our schemas test check all files if they are present, but it so far it did not check
that the request and response schema referenced in software.cfg.json were really
existing and they were missing for some softwares.

This extends the test to check that request / response exists and add missing responses for cdn-me and srslte

See merge request nexedi/slapos!910

So that the test fail if they are missing.

monitor_v6_url and info_1 were not documented, monitor_v6_url is useless
since we have monitor_url and info_1 seems "self explanatory" for humans
and not targeted at machines.

also fix typo on publish-connection-informations

It's empty because the instance does not publish anything at this point.

See merge request nexedi/slapos!892

It allows to access monitoring with a monitoring web app.

If the service crash it will inform master by trigger a "bang" call

Learn more by reading: README.update-hash.rst

This repairs buildout profiles on python 2.

To backport the patch on old profiles, a simpler version is to append this to buildout.cfg :

```
[versions]
pyrsistent = 0.16.1
```

See merge request nexedi/slapos!908

some depends egg have special installation methods, we need more than
just listing the egg to install it.

1.0.167 can not longer be installed, 1.0.167.1 is 1.0.167 with a fix
backported.

pyrsistent has a setup_require of pytest-runner. Buildout installs
setup_require from their latest version, regardless of [versions]. When a
new version of pytest-runner was released without python 2 support this
broke installation of software releases on python 2.