This reverts commit bf75e8a9.

also parallel build becomes possible again.

Ruby2.1

To support GitLab we need current Ruby oldstable, which is Ruby 2.1.6.

Rationale: https://gitlab.com/gitlab-org/gitlab-ce/commit/757df0142f521380b92d28a721a7fd2bd8aa382f

/cc @kazuhiko

See merge request !5

Current Ruby stable is 2.2.2, but current GitLab does not work with it,
and requires current Ruby oldstable, which is 2.1.6:

    https://gitlab.com/gitlab-org/gitlab-ce/commit/757df0142f521380b92d28a721a7fd2bd8aa382f

/cc @kazuhiko

In the next patch we'll add another version of Ruby, and it will make
sense to share common configuration for Ruby compiling.

/cc @kazuhiko

Like with e.g. python or readline, or like with versioned programs e.g.
on Debian, put version into name without dash. So

    ruby-2.2 -> ruby2.2

/cc @kazuhiko

to avoid possible symbol lookup error, like "libreadline.so.6: undefined symbol: UP".

A new recipe deploy a python HTTPServer which is used to share files between all vm in the cluster
the url is something like: https:IPv6:port/HASH-PATH/FILES
Access to root https:IPv6:port/ is forbiden.

Merge branch 'master' of https://lab.nexedi.cn/nexedi/slapos

* 'master' of https://lab.nexedi.cn/nexedi/slapos:
  openssl: Allow it to be build with make -jN   N > 1
  openssl: Convert patches to -p1