We'll probably change the protocol to use msgpack instead of trees of Python
structs. By adding the dependency now, it will be possible to update the NEO
code (which is in development mode) without rebuilding the whole software.

If not so, trafficserver configuration is removed and then replaced on
every slapos node instance call making traffic server unstable

component/bazel: Use zulu openjdk8 to build bazel. We don't need to install linux distribution's openjdk8 package.

software/seleniumrunner: use Firefox 45 for now until we fix erp5.util so that non-ASCII character in stderr does not block test suites.

Upstream seem to have re-released the same version (?!) with the patch
pre-applied. Oh well.

Now that it really works.

Helps sections using ${:_buildout_section_name_} to avoid filename
duplication.

Useful only for software-release development, not usage, so not adding it
to packaging, only to repository.

Still many variants which could likely be simplified.

Use a special milter to do what postfix cannot do with its internal
mechanisms.
- fixes postfix-generated bounces so they reach postmaster mail address
  without being rewritten
- actually makes postfix relay rewritten mails (virtual_alias implicitly
  affects virtual_domains, in turn making all mail addresses considered
  locally hosted, which cannot and must not successfully deliver)
Also, backport a yet-unreleased-but-already-upstreamed patch fixing
rcpt value truncation, which breaks when recipient address is not
enclosed in angle brackets - making the mail still reach original
recipient.

Disable more mariadb options during backup restoration:
- relax durability
- disable binlogs
- disable slow log
Bits of this commit were already accidentally (but harmlessly) pushed as
part of
  commit 5bde847f
  Author: Vincent Pelletier <vincent@nexedi.com>
  Date:   Tue Feb 21 16:02:21 2017 +0900

    stack.erp5: Avoid duplicating mariadb service paths.