Add the bootstrap tag name to the log messages, so people
troubleshooting connection problems can look up a symbol instead of a
number.  Closes ticket 28731.

Reset the added bootstrap tracking state introduced by ticket 27169.
Fixes bug 28524; bugfix on 0.3.5.1-alpha.

This commit just moves the code to two separate files. The geoip
code still has a few needless dependencies on core/* and features/*.

It differs from the rest of the rephist code in that it's actually
necessary for Tor to operate, so it should probably go somewhere
else.  I'm not sure where yet, so I'll leave it in the same
directory, but give it its own file.

Make them only include the headers that they needed, and sort their
headers while we're at it.

Parts of this C file naturally belong in dircache, dirclient, and
dircommon: so, move them there.

The main.c code is responsible for initialization and shutdown;
the mainloop.c code is responsible for running the main loop of Tor.

Splitting the "generic event loop" part of mainloop.c from the
event-loop-specific part is not done as part of this patch.

In dirauth:
  * bwauth.c reads and uses bandwidth files
  * guardfraction.c reads and uses the guardfraction file
  * reachability.c tests relay reachability
  * recommend_pkg.c handles the recommended-packages lines.
  * recv_descs.c handles fingerprint files and processing incoming
    routerinfos that relays upload to us
  * voteflag.c computes flag thresholds and sets those thresholds on
    routerstatuses when computing votes

In control:
  * fmt_serverstatus.c generates the ancient "v1 server status"
    format that controllers expect.

In nodelist:
  * routerstatus_fmt.c formats routerstatus entries for a consensus,
    a vote, or for the controller.

There are now separate modules for:
    * the list of router descriptors
    * the list of authorities and fallbacks
    * managing authority certificates
    * selecting random nodes

This commit only moves code. No functionality has been changed.

Existing cached directory information can cause misleadingly high
bootstrap percentages.  To improve user experience, defer reporting of
directory information progress until at least one connection has
succeeded to a relay or bridge.

Closes ticket 27169.

Track bootstrap phase (enumerated by bootstrap_status_t) independently
from the bootstrap progress (which can represent intermediate
progress).  This allows control_event_bootstrap_problem() to avoid
doing a linear search through the bootstrap progress space to find the
current bootstrap phase.

Eliminate a few conditional expressions in
control_event_bootstrap_core() by overwriting the status parameter.

Move the mostly-invariant part of control_event_boostrap() into a
helper control_event_bootstrap_core().  The helper doesn't modify any
state beyond doing logging and control port notifications.

Simplify control_event_bootstrap() by making it return void again.  It
is currently a fairly complicated function, and it's made more
complicated by returning an int to signal whether it logged at NOTICE
or INFO.

The callers conditionally log messages at level NOTICE based on this
return value.  Change the callers to unconditionally log their verbose
human-readable messages at level INFO to keep NOTICE logs less
cluttered.

This partially reverts the changes of #14950.

We already had fallback code for "dir/status-vote/current/consensus"
to read from disk if we didn't have a cached_dir_t available.  But
there's a function in networkstatus_t that does it for us, so let's
do that.

It is not nice to expose a private key's contents without having the
function name advertise the fact.  Fortunately, we weren't misusing
these yet.

Sends the Tor controller the uptime in seconds.
Highly useful for monitoring purposes.

I am very glad to have written this script.

This commit won't build yet -- it just puts everything in a slightly
more logical place.

The reasoning here is that "src/core" will hold the stuff that every (or
nearly every) tor instance will need in order to do onion routing.
Other features (including some necessary ones) will live in
"src/feature".  The "src/app" directory will hold the stuff needed
to have Tor be an application you can actually run.

This commit DOES NOT refactor the former contents of src/or into a
logical set of acyclic libraries, or change any code at all.  That
will have to come in the future.

We will continue to move things around and split them in the future,
but I hope this lays a reasonable groundwork for doing so.

The standard is printf("%"PRIu64, x);

or.h should really include only the minimum of stuff from or/*,
common/*, and lib/*.

For HSv3, the HSADDRESS= wasn't properly parsed for the HSPOST command. It now
correctly use it and furthermore sends back a "200 OK" in case the command is
successful for a v3 descriptor.

Fixes #26523

Signed-off-by: David Goulet <dgoulet@torproject.org>