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Copy forward the changelog for 0.4.5.3-rc.

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Changes in version 0.4.5.3-rc - 2021-01-12
Tor 0.4.5.3-rc is the first release candidate in its series. It fixes
several bugs, including one that broke onion services on certain older
ARM CPUs, and another that made v3 onion services less reliable.
Though we anticipate that we'll be doing a bit more clean-up between
now and the stable release, we expect that our remaining changes will
be fairly simple. There will be at least one more release candidate
before 0.4.5.x is stable.
o Major bugfixes (onion service v3):
- Stop requiring a live consensus for v3 clients and services, and
allow a "reasonably live" consensus instead. This allows v3 onion
services to work even if the authorities fail to generate a
consensus for more than 2 hours in a row. Fixes bug 40237; bugfix
on 0.3.5.1-alpha.
o Minor features (crypto):
- Fix undefined behavior on our Keccak library. The bug only
appeared on platforms with 32-byte CPU cache lines (e.g. armv5tel)
and would result in wrong digests. Fixes bug 40210; bugfix on
0.2.8.1-alpha. Thanks to Bernhard Übelacker, Arnd Bergmann and
weasel for diagnosing this.
o Minor features (documentation):
- Mention the "!badexit" directive that can appear in an authority's
approved-routers file, and update the description of the
"!invalid" directive. Closes ticket 40188.
o Minor bugfixes (compilation):
- Fix a compilation warning about unreachable fallthrough
annotations when building with "--enable-all-bugs-are-fatal" on
some compilers. Fixes bug 40241; bugfix on 0.3.5.4-alpha.
- Fix the "--enable-static-tor" switch to properly set the "-static"
compile option onto the tor binary only. Fixes bug 40111; bugfix
on 0.2.3.1-alpha.
o Minor bugfixes (config, bridge):
- Really fix the case where torrc has a missing ClientTransportPlugin
but is configured with a Bridge line and UseBridges. Previously,
we didn't look at the managed proxy list and thus would fail for
the "exec" case. Fixes bug 40106; bugfix on 0.4.5.1-alpha.
o Minor bugfixes (logging, relay):
- Log our address as reported by the directory authorities, if none
was configured or detected before. Fixes bug 40201; bugfix
on 0.4.5.1-alpha.
- When a launching bandwidth testing circuit, don't incorrectly call
it a reachability test, or trigger a "CHECKING_REACHABILITY"
control event. Fixes bug 40205; bugfix on 0.4.5.1-alpha.
o Minor bugfixes (relay, statistics):
- Report the correct connection statistics in our extrainfo
documents. Previously there was a problem in the file loading
function which would wrongly truncate a state file, causing the
wrong information to be reported. Fixes bug 40226; bugfix
on 0.4.5.1-alpha.
o Minor bugfixes (SOCKS5):
- Handle partial SOCKS5 messages correctly. Previously, our code
would send an incorrect error message if it got a SOCKS5 request
that wasn't complete. Fixes bug 40190; bugfix on 0.3.5.1-alpha.
Changes in version 0.4.5.2-alpha - 2020-11-23
Tor 0.4.5.2-alpha is the second alpha release in the 0.4.5.x series.
It fixes several bugs present in earlier releases, including one that