Buildout expects all needed sections to have been accessed during the
sectoin initialisation pass. It does not like having them accessed during
the "install" pass, and emits a very cryptic error:
  While:
    Installing publish.
  Error: Missing option: publish-early:__buildout_signature__

  Version up only goes to buildout2 case, buildout 1 series keep the same.

For sftp to work we need to define sftp "subsystem" on server side in
sshd speak. Sftp support in turn allows for sshfs to work.

NOTE

	Subsystem sftp internal-sftp

won't work because we are doing games with ForceCommand and reexecution
of "$SSH_ORIGINAL_COMMAND" (see previous patch for details).

2a733418 (slaprunner: replaces dropbear by openssh) switched slaprunner
sshd from dropbear to openssh (thanks for it once again) and used
ForceCommand to imitate login shell to be partitions `${bash:location}/bin/bash -l`.

For case when original ssh command is explicitly provided
("$SSH_ORIGINAL_COMMAND" is not empty) the code there tries to just
execute what was provided by caller.

However the reexecution is not completely correct as for cases when
origin command contains some quoting, 1 level of quotes is removed.

The case when I hit this in practice is git access to repositories over
ssh. When git wants to e.g. clone a repository it runs `git-upload-pack
quoted-path-to-repo.git` and fails this way:

```
$ GIT_TRACE=1 git clone ssh://host1/~/B.git
19:28:23.558858 git.c:350               trace: built-in: git 'clone' 'ssh://host1/~/B.git'
Cloning into 'B'...
19:28:23.572994 run-command.c:336       trace: run_command: 'ssh' 'host1' 'git-upload-pack '\''~/B.git'\'''
fatal: ''~/B.git'' does not appear to be a git repository
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
```

Quoting SSH_ORIGINAL_COMMAND and evaluating it completely via eval fixes this.

/cc @Nicolas, @alain.takoudjou

Because this url is use by [erp5_promise](https://lab.nexedi.com/nexedi/erp5/blob/450ae11128503934b4d81de8c7c72ba7aa7948d5/bt5/erp5_promise/SkinTemplateItem/portal_skins/erp5_promise/Alarm_checkPromiseConversionServer.py#L5) to configure cloudooo in the preference, but erp5 preference is not supposed to be `cloudooo://` but just `http://` . 

FYI, this erp5_promise is the **Check Site Consistency** part described in the "ERP5 on webrunner" installation procedure as documented in https://www.erp5.com/erp5-HowTo.Request.Erp5.Instance.On.Slap.Os.Webrunner

/cc @tc @vpelletier 

/reviewed-on !94

It depends on RINA libraries installed system-wide, which in turn depend on
other libraries like libssl and zlib.

Slapos.toolbox has a new dependency to pycurl, which fails to compile if libcurl cannot be found. This commit adds the component/pycurl dependency to most of the Software Releases which have a dependency to slapos.toolbox.

I tried to do it globally, so I couldn't check the compilation of all the modified SRs. Is it a way to test that all SRs still compiled ?

Also, did I forget some important SR ?

@rafael @alain.takoudjou @kazuhiko @jm 

/reviewed-on nexedi/slapos!97