This is needed for IOCP, since telling the IOCP backend about all
your CPUs is a good idea.  It'll also come in handy with asn's
multithreaded crypto stuff, and for people who run servers without
reading the manual.

plus quiet a log line

This commit adds some functions to see what microdescriptors we're missing,
and adds fetch-microdesc/store-microdesc logic to the directory code.

This will be needed when "get_live_consensus" potentially returns a
microdesc consensus.

We need this to tell if a given consensus flavor is being downloaded
or not.

Conflicts:
	src/or/config.c

When we enabled support to change statistic options without restarting
Tor we forgot to initialize geoip_countries. Fix that.

Thanks to Sebastian for his code-review of the bufferevents patch series.x

automake 1.6 doesn't like using a conditional += to add stuff to foo_LDADD.
Instead you need to conditionally define a variable, then non-conditionally
put that variable in foo_LDADD.

This requires the latest Git version of Libevent as of 24 March 2010.
In the future, we'll just say it requires Libevent 2.0.5-alpha or
later.

Since Libevent doesn't yet support hierarchical rate limit groups,
there isn't yet support for tracking relayed-bytes separately when
using the bufferevent system.  If a future version does add support
for hierarchical buckets, we can add that back in.

Clients are now verified to work and build circuits correctly.  There
are still a few warnings given here and there that I need to look into.

This was possible if we have already decided to close a bufferevent
connection, but the other side decides to close it first.