Document the missing API calls.

Here are a few that are missing from the https://keybase.io/__/api-docs/1.0 documentation page.

https://keybase.io/_/api/1.0/user/autocomplete.json?q={query} (used for search)

Other undocumented API calls:
https://keybase.io/_/api/1.0/email/send-verify.json (takes "email" as a POST parameter)
https://keybase.io/_/api/1.0/sig/next_seqno.json?type={type} (type is "PUBLIC")

Open the linked API documentation page and compare its listed calls with the three endpoint URLs in the issue. Document the autocomplete, email verification, and next-seqno calls, including the query or POST parameters shown; done means all three are represented on the page.

Written by the indexing model from the issue text.