Add flag to tlslite's HandshakeSettings to disable channel ID on the test server

BUG=467312

Review URL: https://codereview.chromium.org/1339193002

Cr-Original-Commit-Position: refs/heads/master@{#348980}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: d847891ff6043c03f71656fe735e65dcf8acc934
4 files changed