Update legal-dos to latest master.

Changes:

* 78996df Merge pull request #268 from GeoffPiperMZ/patch-9
* d5e8809 Update en-US.md
* 8442c99 Clarifications
* d99a09f Clarify conversation URLs & direct calls
* c6ec83e Change to branding term
* ad8cfa2 Clarifications to ToS
* a87d1aa Clarifications
* 7e3dc14 more clarifications in response to governance thread
* 95ae568 Clarifications in response to governance thread