Merge remote-tracking branch 'origin/web/15425-3.6.1-release-notes' into web/release-3.6.1 (Closes: #15425)

I'm pretty sure it'll break the ISO build.

This reverts commit d5f2ccf2.

Tor Browser currently enables SELFRANDO "only in non-release builds"
(https://trac.torproject.org/projects/tor/ticket/24912#comment:8).

segfault authored Mar 14, 2018 and intrigeri committed Mar 16, 2018

The glob pattern passed to strip_nondeterminism_wrapper() doesn't
expand, because it is quoted. Pass a real path instead.

segfault authored Mar 14, 2018 and intrigeri committed Mar 16, 2018

Will-fix: #15400

I wouldn't have used an inline if the content was meant to be used only
twice, but we should reuse it at least for the 3.6.1 release notes and
probably for 3.7 as well.

The goal is to avoid issues such as #15400: Jenkins had been telling us for
48 hours that the testing branch did not build reproducibly anymore,
but the release manager missed that, built a tentative 3.6 ISO and decided
to release it as-is.

refs: #15400