Part of 6736 effort to try to make startup quieter.

If s_values is null in rep_hist_load_bwhist_state_section, we would
call smartlist_len() on it, and die.

Fixes bug 6801.

addresses bug 6605.

If dirvote_create_microdescriptor() returns NULL, don't use md.

Found by "f. tp.".

Fixes bug 6797.

Implements ticket 6789.

Based on a patch from Linus, regenerated so as to not conflict with
Linus's 5535/6363 patches.

We already do this for libevent; let's do it for openssl too.

For now, I'm making it always a warn, since this has caused some
problems in the past.  Later, we can see about making it less severe.

OTOH, log the Libevent and OpenSSL versions on the first line when
we're starting Tor.

We were trying to incorporate all headers in common_sha1.i, not just
the src/common ones.

This is part of bug 6778; fix on 0.2.4.1-alpha

Harmless unless we somehow generate a microdesc of more than INT_MAX
bytes.

This is just a precaution; we seem to be using var_cell_t.payload and
var_cell_t.payload_len correctly at the moment.

we can turn it into an autobool later if we have some way for it
to make a decision.

(patch possibly got lost when nickm merged #6770; or maybe nickm meant
for it to be this way. i'm not sure.)

Fix for bug 6774; bugfix on 0.2.3.17-beta.

Use router_get_advertised_{dir,or}_port() functions instead of
get_primary_{dir,or}_port().

* Add changes/ files.
* Edit the tor-fw-helper manpage.
* Fix check-spaces.
* Add prototype for get_list_of_ports_to_forward().
* Fix tor_parse_long() TCP port range.
* Improve doc. of tor_check_port_forwarding().
* Check for overflows in tor_check_port_forwarding().
* Demote successful port forwarding to LOG_INFO.

Conflicts:
	src/common/address.c
	src/or/circuitbuild.c

Conflicts:
	src/or/circuitbuild.h

Conflicts:
	src/or/transports.c

Add handle_fw_helper_output(), a function responsible for parsing the
output of tor-fw-helper. Refactor tor_check_port_forwarding() and
run_scheduled_events() accordingly too.

We now issue warnings when we get control output from tor-fw-helper,
and we log the verbose output of tor-fw-helper in LOG_INFO.

Conflicts:
	src/common/util.c