We need to _REJECT_ descriptors with accept6/reject6 lines.  If we
let them onto the network , other un-upgraded tors will crash.

This reverts commit b3918b3b.

Conflicts:
	src/or/policies.c

This fixes a remotely triggerable assert on directory authorities, who
don't handle descriptors with ipv6 contents well yet. We will want to
revert this once we're ready to handle ipv6.

Issue raised by lorth on #tor, who wasn't able to use Tor anymore.
Analyzed with help from Christian Fromme. Fix suggested by arma. Bugfix
on 0.2.1.3-alpha.

This should fix a bug that special ran into, where if your state file
didn't record period maxima, it would never decide that it had
successfully parsed itself unless you got lucky with your
uninitialized-variable values.

This patch also tries to improve error messags in the case where a
maximum value legitimately doesn't parse.

We should really require a modern asiidoc: backporting stuff to 8.2 is
a timesink.

Conflicts:
	configure.in

(This is an "ours" merge of the code for bug1859 backported to 0.2.1.)

Use "ours" strategy" to avoid taking bug2402 fix.

Patch from "postman" on trac. Fixes bg 2366. Bug on 0.1.2.5-alpha.

Conflicts:
	doc/Makefile.am
	doc/spec/Makefile.am
	doc/spec/address-spec.txt
	doc/spec/bridges-spec.txt
	doc/spec/control-spec-v0.txt
	doc/spec/control-spec.txt
	doc/spec/dir-spec-v1.txt
	doc/spec/dir-spec-v2.txt
	doc/spec/dir-spec.txt
	doc/spec/path-spec.txt
	doc/spec/proposals/000-index.txt
	doc/spec/proposals/001-process.txt
	doc/spec/proposals/098-todo.txt
	doc/spec/proposals/099-misc.txt
	doc/spec/proposals/100-tor-spec-udp.txt
	doc/spec/proposals/101-dir-voting.txt
	doc/spec/proposals/102-drop-opt.txt
	doc/spec/proposals/103-multilevel-keys.txt
	doc/spec/proposals/104-short-descriptors.txt
	doc/spec/proposals/105-handshake-revision.txt
	doc/spec/proposals/106-less-tls-constraint.txt
	doc/spec/proposals/107-uptime-sanity-checking.txt
	doc/spec/proposals/108-mtbf-based-stability.txt
	doc/spec/proposals/109-no-sharing-ips.txt
	doc/spec/proposals/110-avoid-infinite-circuits.txt
	doc/spec/proposals/111-local-traffic-priority.txt
	doc/spec/proposals/112-bring-back-pathlencoinweight.txt
	doc/spec/proposals/113-fast-authority-interface.txt
	doc/spec/proposals/114-distributed-storage.txt
	doc/spec/proposals/115-two-hop-paths.txt
	doc/spec/proposals/116-two-hop-paths-from-guard.txt
	doc/spec/proposals/117-ipv6-exits.txt
	doc/spec/proposals/118-multiple-orports.txt
	doc/spec/proposals/119-controlport-auth.txt
	doc/spec/proposals/120-shutdown-descriptors.txt
	doc/spec/proposals/121-hidden-service-authentication.txt
	doc/spec/proposals/122-unnamed-flag.txt
	doc/spec/proposals/123-autonaming.txt
	doc/spec/proposals/124-tls-certificates.txt
	doc/spec/proposals/125-bridges.txt
	doc/spec/proposals/126-geoip-reporting.txt
	doc/spec/proposals/127-dirport-mirrors-downloads.txt
	doc/spec/proposals/128-bridge-families.txt
	doc/spec/proposals/129-reject-plaintext-ports.txt
	doc/spec/proposals/130-v2-conn-protocol.txt
	doc/spec/proposals/131-verify-tor-usage.txt
	doc/spec/proposals/132-browser-check-tor-service.txt
	doc/spec/proposals/134-robust-voting.txt
	doc/spec/proposals/135-private-tor-networks.txt
	doc/spec/proposals/137-bootstrap-phases.txt
	doc/spec/proposals/138-remove-down-routers-from-consensus.txt
	doc/spec/proposals/140-consensus-diffs.txt
	doc/spec/proposals/141-jit-sd-downloads.txt
	doc/spec/proposals/142-combine-intro-and-rend-points.txt
	doc/spec/proposals/143-distributed-storage-improvements.txt
	doc/spec/proposals/145-newguard-flag.txt
	doc/spec/proposals/146-long-term-stability.txt
	doc/spec/proposals/147-prevoting-opinions.txt
	doc/spec/proposals/148-uniform-client-end-reason.txt
	doc/spec/proposals/149-using-netinfo-data.txt
	doc/spec/proposals/150-exclude-exit-nodes.txt
	doc/spec/proposals/151-path-selection-improvements.txt
	doc/spec/proposals/152-single-hop-circuits.txt
	doc/spec/proposals/153-automatic-software-update-protocol.txt
	doc/spec/proposals/154-automatic-updates.txt
	doc/spec/proposals/155-four-hidden-service-improvements.txt
	doc/spec/proposals/156-tracking-blocked-ports.txt
	doc/spec/proposals/157-specific-cert-download.txt
	doc/spec/proposals/158-microdescriptors.txt
	doc/spec/proposals/159-exit-scanning.txt
	doc/spec/proposals/ideas/xxx-hide-platform.txt
	doc/spec/proposals/ideas/xxx-port-knocking.txt
	doc/spec/proposals/ideas/xxx-separate-streams-by-port.txt
	doc/spec/proposals/ideas/xxx-what-uses-sha1.txt
	doc/spec/proposals/reindex.py
	doc/spec/rend-spec.txt
	doc/spec/socks-extensions.txt
	doc/spec/tor-spec.txt
	doc/spec/version-spec.txt

Fixes bug 2572.

Once again spotted by mobmix

Also add a changes file for the fix