Issue #3028664 by averagejoe3000, phenaproxima, nathandentzau, alexpott: Log exceptions for invalid oEmbed providers

Issue #3183301 by mcdruid, longwave, markwittens, nathandentzau, marcaddeo, janusman, -nrzr-, David_Rothstein, Heine, vijaycs85, xjm, tim.plunkett, pandaski, Wim Leers, larowlan: Add tests for SA-CORE-2020-009

SA-CORE-2020-009 by _nzr_, markwittens, nathandentzau, marcaddeo, janusman, larowlan, David_Rothstein, Wim Leers, vijaycs85, mcdruid, Heine, pandaski, xjm, tim.plunkett

(cherry picked from commit 284f58f0)

Issue #2940029 by Wim Leers, krlucas, legovaer, vijaycs85, nathandentzau, phenaproxima, effulgentsia, Berdir, andrewmacpherson, tstoeckler, oknate, samuel.mortenson, slashrsm, stevector, webflo, thenchev, marcoscano, jibran, Dave Reid, cs_shadow, deepakkumar14, gngn, dpi: Add an input filter to display embedded Media entities

Issue #3002655 by alexpott, johnpicozzi, nathandentzau, larowlan: Optional profile configuration can be unexpectedly recreated after being deleted