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Forward-port the 0.2.8.3-alpha changelog

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Changes in version 0.2.9.1-alpha - 2016-??-??
Changes in version 0.2.8.3-alpha - 2016-05-26
Tor 0.2.8.3-alpha resolves several bugs, most of them introduced over
the course of the 0.2.8 development cycle. It improves the behavior of
directory clients, fixes several crash bugs, fixes a gap in compiler
hardening, and allows the full integration test suite to run on
more platforms.
o Major bugfixes (security, client, DNS proxy):
- Stop a crash that could occur when a client running with DNSPort
received a query with multiple address types, and the first
address type was not supported. Found and fixed by Scott Dial.
Fixes bug 18710; bugfix on 0.2.5.4-alpha.
o Major bugfixes (security, compilation):
- Correctly detect compiler flags on systems where _FORTIFY_SOURCE
is predefined. Previously, our use of -D_FORTIFY_SOURCE would
cause a compiler warning, thereby making other checks fail, and
needlessly disabling compiler-hardening support. Fixes one case of
bug 18841; bugfix on 0.2.3.17-beta. Patch from "trudokal".
o Major bugfixes (security, directory authorities):
- Fix a crash and out-of-bounds write during authority voting, when
the list of relays includes duplicate ed25519 identity keys. Fixes
bug 19032; bugfix on 0.2.8.2-alpha.
o Major bugfixes (client, bootstrapping):
- Check if bootstrap consensus downloads are still needed when the
linked connection attaches. This prevents tor making unnecessary
begindir-style connections, which are the only directory
connections tor clients make since the fix for 18483 was merged.
- Fix some edge cases where consensus download connections may not
have been closed, even though they were not needed. Related to fix
for 18809.
- Make relays retry consensus downloads the correct number of times,
rather than the more aggressive client retry count. Fixes part of
ticket 18809.
- Stop downloading consensuses when we have a consensus, even if we
don't have all the certificates for it yet. Fixes bug 18809;
bugfix on 0.2.8.1-alpha. Patches by arma and teor.
o Major bugfixes (directory mirrors):
- Decide whether to advertise begindir support in the the same way
we decide whether to advertise our DirPort. Allowing these
decisions to become out-of-sync led to surprising behavior like
advertising begindir support when hibernation made us not
advertise a DirPort. Resolves bug 18616; bugfix on 0.2.8.1-alpha.
Patch by teor.
o Major bugfixes (IPv6 bridges, client):
- Actually use IPv6 addresses when selecting directory addresses for
IPv6 bridges. Fixes bug 18921; bugfix on 0.2.8.1-alpha. Patch
by "teor".
o Major bugfixes (key management):
- If OpenSSL fails to generate an RSA key, do not retain a dangling
pointer to the previous (uninitialized) key value. The impact here
should be limited to a difficult-to-trigger crash, if OpenSSL is
running an engine that makes key generation failures possible, or
if OpenSSL runs out of memory. Fixes bug 19152; bugfix on
0.2.1.10-alpha. Found by Yuan Jochen Kang, Suman Jana, and
Baishakhi Ray.
o Major bugfixes (testing):
- Fix a bug that would block 'make test-network-all' on systems where
IPv6 packets were lost. Fixes bug 19008; bugfix on tor-0.2.7.3-rc.
- Avoid "WSANOTINITIALISED" warnings in the unit tests. Fixes bug 18668;
bugfix on 0.2.8.1-alpha.
o Minor features (clients):
- Make clients, onion services, and bridge relays always use an
encrypted begindir connection for directory requests. Resolves
ticket 18483. Patch by "teor".
o Minor features (fallback directory mirrors):
- Give each fallback the same weight for client selection; restrict
fallbacks to one per operator; report fallback directory detail
changes when rebuilding list; add new fallback directory mirrors
to the whitelist; update fallback directories based on the latest
OnionOO data; and any other minor simplifications and fixes.
Closes tasks 17158, 17905, 18749, bug 18689, and fixes part of bug
18812 on 0.2.8.1-alpha; patch by "teor".
o Minor features (geoip):
- Update geoip and geoip6 to the May 4 2016 Maxmind GeoLite2
Country database.
o Minor bugfixes (assert, portability):
- Fix an assertion failure in memarea.c on systems where "long" is
shorter than the size of a pointer. Fixes bug 18716; bugfix
on 0.2.1.1-alpha.
o Minor bugfixes (bootstrap):
- Consistently use the consensus download schedule for authority
certificates. Fixes bug 18816; bugfix on 0.2.4.13-alpha.
o Minor bugfixes (build):
- Remove a pair of redundant AM_CONDITIONAL declarations from
configure.ac. Fixes one final case of bug 17744; bugfix
on 0.2.8.2-alpha.
- Resolve warnings when building on systems that are concerned with
signed char. Fixes bug 18728; bugfix on 0.2.7.2-alpha
and 0.2.6.1-alpha.
- When libscrypt.h is found, but no libscrypt library can be linked,
treat libscrypt as absent. Fixes bug 19161; bugfix
on 0.2.6.1-alpha.
o Minor bugfixes (client):
- Turn all TestingClientBootstrap* into non-testing torrc options.
This changes simply renames them by removing "Testing" in front of
them and they do not require TestingTorNetwork to be enabled
anymore. Fixes bug 18481; bugfix on 0.2.8.1-alpha.
- Make directory node selection more reliable, mainly for IPv6-only
clients and clients with few reachable addresses. Fixes bug 18929;
bugfix on 0.2.8.1-alpha. Patch by "teor".
o Minor bugfixes (controller, microdescriptors):
- Make GETINFO dir/status-vote/current/consensus conform to the
control specification by returning "551 Could not open cached
consensus..." when not caching consensuses. Fixes bug 18920;
bugfix on 0.2.2.6-alpha.
o Minor bugfixes (crypto, portability):
- The SHA3 and SHAKE routines now produce the correct output on Big
Endian systems. No code calls either algorithm yet, so this is
primarily a build fix. Fixes bug 18943; bugfix on 0.2.8.1-alpha.
- Tor now builds again with the recent OpenSSL 1.1 development
branch (tested against 1.1.0-pre4 and 1.1.0-pre5-dev). Closes
ticket 18286.
o Minor bugfixes (directories):
- When fetching extrainfo documents, compare their SHA256 digests
and Ed25519 signing key certificates with the routerinfo that led
us to fetch them, rather than with the most recent routerinfo.
Otherwise we generate many spurious warnings about mismatches.
Fixes bug 17150; bugfix on 0.2.7.2-alpha.
o Minor bugfixes (logging):
- When we can't generate a signing key because OfflineMasterKey is
set, do not imply that we should have been able to load it. Fixes
bug 18133; bugfix on 0.2.7.2-alpha.
- Stop periodic_event_dispatch() from blasting twelve lines per
second at loglevel debug. Fixes bug 18729; fix on 0.2.8.1-alpha.
- When rejecting a misformed INTRODUCE2 cell, only log at
PROTOCOL_WARN severity. Fixes bug 18761; bugfix on 0.2.8.2-alpha.
o Minor bugfixes (pluggable transports):
- Avoid reporting a spurious error when we decide that we don't need
to terminate a pluggable transport because it has already exited.
Fixes bug 18686; bugfix on 0.2.5.5-alpha.
o Minor bugfixes (pointer arithmetic):
- Fix a bug in memarea_alloc() that could have resulted in remote
heap write access, if Tor had ever passed an unchecked size to
memarea_alloc(). Fortunately, all the sizes we pass to
memarea_alloc() are pre-checked to be less than 128 kilobytes.
Fixes bug 19150; bugfix on 0.2.1.1-alpha. Bug found by
Guido Vranken.
o Minor bugfixes (relays):
- Consider more config options when relays decide whether to
regenerate their descriptor. Fixes more of bug 12538; bugfix
on 0.2.8.1-alpha.
- Resolve some edge cases where we might launch an ORPort
reachability check even when DisableNetwork is set. Noticed while
fixing bug 18616; bugfix on 0.2.3.9-alpha.
o Minor bugfixes (statistics):
- We now include consensus downloads via IPv6 in our directory-
request statistics. Fixes bug 18460; bugfix on 0.2.3.14-alpha.
o Minor bugfixes (testing):
- Allow directories in small networks to bootstrap by skipping
DirPort checks when the consensus has no exits. Fixes bug 19003;
bugfix on 0.2.8.1-alpha. Patch by teor.
- Fix a small memory leak that would occur when the
TestingEnableCellStatsEvent option was turned on. Fixes bug 18673;
bugfix on 0.2.5.2-alpha.
o Minor bugfixes (time handling):
- When correcting a corrupt 'struct tm' value, fill in the tm_wday
field. Otherwise, our unit tests crash on Windows. Fixes bug
18977; bugfix on 0.2.2.25-alpha.
o Documentation:
- Document the contents of the 'datadir/keys' subdirectory in the
manual page. Closes ticket 17621.
- Stop recommending use of nicknames to identify relays in our
MapAddress documentation. Closes ticket 18312.
Changes in version 0.2.8.2-alpha - 2016-03-28
Tor 0.2.8.2-alpha is the second alpha in its series. It fixes numerous
bugs in earlier versions of Tor, including some that prevented