Update manual page on Tor website

https://www.torproject.org/docs/tor-manual.html.en is currently from an old version of Tor.

Can we please:

• Update it to the latest released version (0.2.7.3)?
  • Update any website documents that come from the Tor distribution (like example torrcs) from the git maint-0.2.7.3 tag?
• Place a Tor version number or date on each of these pages?