Implement a placeholder mechanism in the channel,id->circ map

We'll use this to help fix bug 7912, by providing a way to mark
that a circuit ID can't get reused while a DESTROY is queued but not sent.
When launching a resolve request on behalf of an AF_UNIX control, omit the address field of the new entry connection.  Fixes bug 8639.
Add support for offsetting the voting interval in order to bootstrap faster.

A new option TestingV3AuthVotingStartOffset is added which offsets the
starting time of the voting interval. This is possible only when
TestingTorNetwork is set.

This patch makes run_scheduled_events() check for new consensus
downloads every second when TestingTorNetwork, instead of every
minute. This should be fine, see #8532 for reasoning.

This patch also brings MIN_VOTE_SECONDS and MIN_DIST_SECONDS down from
20 to 2 seconds, unconditionally. This makes sanity checking of
misconfiguration slightly less sane.

Addresses #8532.
Fix tor-fw-helper exit code.

It's returning the number of initialized backends.

(changes file added by nickm; this is a fix for bug #9030)
Hide consensus download interval, depending on TestingTorNetwork, in a macro.
Use double-quotes for regular_mans, not brackets.

This is a bashism; on systems where sh is not bash (eg., non-Linux, or
Ubuntu using dash), this breaks with a syntax error. This also doesn't
work properly in bash: only the first item is iterated on.
Expand microdesc cache tests

Is it possible that *every* attempt to replace the microdesc cache on
windows 7 is going to fail because of our lack of FILE_SHARE_DELETE
while opening the file?  If so, this test will catch #2077 and let us
know when it's fixed.
Use the FILE_SHARE_DELETE flag for CreateFile on a mapping

A comment by rransom on #8795 taken together with a comment by doorss
recorded on #2077 suggest that *every* attempt to replace the md cache
will fail on Vista/Win7 if we don't have the FILE_SHARE_DELETE flag
passed to CreateFile, and if we try to replace the file ourselves
before unmapping it.  I'm adding the FILE_SHARE_DELETE, since that's
this simplest fix.  Broken indexers (the favored #2077 hypothesis)
could still cause trouble here, but at least this patch should make us
stop stepping on our own feet.

Likely fix for #2077 and its numerous duplicates. Bugfix on
0.2.2.6-alpha, which first had a microdescriptor cache that would get
replaced before remapping it.
Merge remote-tracking branch 'public/bug2077_share_delete' into maint-0.2.4
Merge remote-tracking branch 'origin/maint-0.2.4'
Revert "Use the FILE_SHARE_DELETE flag for CreateFile on a mapping"

This reverts commit 884a0e269c382f9e927d8c8b1ef4ef9d2d48379d.

I'm reverting this because it doesn't actually make the problem go
away.  It appears that instead we need to do unmap-then-replace.
Unmap the microdescriptor cache before replacing it.

This is a reprise of the fix in bdff7e3299d78; 6905c1f6 reintroduced
that bug.  Briefly: windows doesn't seem to like deleting a mapped
file.  I tried adding the PROT_SHARED_DELETE flag to the createfile
all, but that didn't actually fix this issue.  Fortunately, the unit
test I added in 4f4fc63fea0589a4fa03f3859dc27860cdde75af should
prevent us from making this particular screw-up again.

This patch also tries to limit the crash potential of a failure to
write by a little bit, although it could do a better job of retaining
microdescriptor bodies.

Fix for bug 8822, bugfix on 0.2.4.12-alpha.
Make all consumers of microdesc_t.body tolerate NULL

This is another fix to try to mitigate recurrences of 8031/8822.
Merge remote-tracking branch 'origin/maint-0.2.4'
Fix #9043 - simplyfy the code and use EVP_PKEY_cmp instead of pkey_eq / tor_tls_evp_pkey_eq
Issue #9043 - changelog entry
Merge remote-tracking branch 'andrea/bug8639_v3' into maint-0.2.4
Merge remote-tracking branch 'origin/maint-0.2.4'
Remove various outdated documents.

doc/TODO and doc/spec/README were placeholders to tell people where to
look for the real TODO and README stuff -- we replaced them years ago,
though.

authority-policy, v3-authority-howto, and torel-design.txt belong in
torspec.  I'm putting them in attic there since I think they may be in
large part obsolete, but someone can rescue them if they're not.

translations.txt is outdated, and refers to lots of programs other
than Tor.  We have much better translation resources on the website
now.

tor-win32-mingw-creation.txt is pending review of a revised version
for 0.2.5 (see ticket #4520), but there's no reason to ship this one
while we're waiting for an accurate version.

the tor-rpm-creation.txt isn't obsolete AFAIK, but it belongs in
doc/contrib if anywhere.

Resolves bug #8965.
Merge remote-tracking branch 'origin/maint-0.2.4'