Proposals 196 (ExtORPort) and 217 (ExtORPort authentication) were merged
together into ext-orport-spec.txt in
tpo/core/torspec#50.

Proposal 232 (TOR_PT_PROXY) became part of pt-spec.txt in
https://gitweb.torproject.org/torspec.git/commit/pt-spec.txt?id=4dcd7e94f17c072e771119ec90d7cbce4a4788a4.