version up : curl 7.29.0.
use slapos.recipe.build:gitclone instead of ad-hoc usage of plone.recipe.command.
also pin 'cloudooo = 1.2.5-dev' to avoid possible usage of old released 1.2.3 egg.
Bump ca-certificates version.
Do not duplicate find-links already present in stack/slapos.cfg .
Any slapos SR may need to use xz-friendly h.r.download .
Fix typo in buildout section name.
Merge remote-tracking branch 'origin/erp5-component' into erp5
Revert "Do not duplicate find-links already present in stack/slapos.cfg ."

This reverts commit 781c1a4441a93f53bd694c4659a8d3b088b7c9f6.
Extended .cfg files are not cooperating, so += is unusable in [buildout]
section, even for find-links.

Conflicts:
	stack/erp5/buildout.cfg
Revert "Do not duplicate find-links already present in stack/slapos.cfg ."

This reverts commit 781c1a4441a93f53bd694c4659a8d3b088b7c9f6.
Extended .cfg files are not cooperating, so += is unusable in [buildout]
section, even for find-links.

Conflicts:
	stack/erp5/buildout.cfg
(cherry picked from commit b4085e5859f6ea257dfc0ac7befa6ca1e602161c)
version up : OpenSSL 1.0.1e.
install more percona-toolkit scripts in instances.
Merge remote-tracking branch 'origin/erp5-component' into erp5
Merge remote-tracking branch 'origin/erp5' into erp5-z2.13

Conflicts:
	stack/erp5/buildout.cfg