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The tests which require configuring fine-grained test server behavior
or, worse, bugs will be harder to resolve (maybe it's time to implement
a barebones MockSSLServer in BoringSSL), but a lot of them can use
EmbeddedTestServer easily.

Since EmbeddedTestServer now pulls in TLS 1.3 which is vastly different
from TLS 1.2, I've made most tests parameterized by version just to be a
bit more thorough in testing.

Bug: 492672
Change-Id: I87232d82d1c3a6f70099976fe4629457856b9f37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1874247Reviewed-by: Steven Valdez <svaldez@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710405}