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.