The required version is already documented in extension.json and
doesn't need to be repeated in README (where it gets forgotten
and not updated).
Change-Id: I667c9a00c0df381c506c877b5ea2786604ec05e8
ClickTracking is deprecated; the config var gating this behavior is set
to false; the data is going to /dev/null; no one is interested in
analyzing it. I think it's dead, Jim.
Change-Id: I71ea8c174e5e38b28f128ccd380ed2a25ad50606
* AFIAK that method isn't as stable as the rest and hasn't been tested
as much to recommend as default.
(not enabled on WMF at least)
Change-Id: I27d40b4f7249daac0110ee49db90e31b453d73a2