This generates a notice, which wasn't seen because the feature works
asynchronously.

Previously, if the RSS feed (extests) was being served locally,
CFG->proxybypass was applied and causing the test to fail (proxy
ignored).

In that exact test we need the configured proxy to be applied
always, because the test is exaclty about detecting the problem
when a wrong proxy is used.

Merge branch 'install_37_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_37_STABLE

Merge branch 'install_37_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_37_STABLE

Some blocks (e.g. Calendar) load additional JS modules when returning
content. We need to make sure they aren't asked to generate content
unless the user can actually view the block, or the expected content
required by the JS will not exist in the DOM and can cause exceptions.

Shifter is using an ancient and no-longer supported of Istanbul. That
version contains a circular dependency whereby it fetches the version
from the index that included the file in the first place.  This throws a
warning on newer versions of Node.

The fix here is simple and intended to be the bare minimum to remove
these warnings anad resolve the issue.

We have forked the istanbul project and created a v0.1.37_moodle branch
at the root version of the Istanbul version that Shifter uses (v0.1.37
tag). The circular dependency is then addressed and a new tag created.

I have then forked Shifter, pointing its package.json at the tar.gz
download of that new tag and pushed a new branch and tag for that fix.

Following this our own package.json is updated to point to the tar.gz
version of the new Shifter tag.

Version 14.0.0 has just been released as stable, and will make its way
to an LTS release which will be supported until 30th April 2023.

At time of writing it is the "Current stable" release and will remain in
this phase until 20th October 2020, at whciih point it will transition
to LTS status.