Fix quarantine media admin API

This reverts commit 08b29d45.

Reject events which have lots of prev_events

Make tests py3 compatible

Use six.itervalues in some places

add __bool__ alias to __nonzero__ methods

Add some more variables to the unittest config

Replace Queue with six.moves.queue

Use str(e) instead of e.message

Clarify that SRV may not point to a CNAME

Document contrib directory

Refactor ResponseCache usage

Refactor store.have_events

It turns out that most of the time we were calling have_events, we were only
using half of the result. Replace have_events with have_seen_events and
get_rejection_reasons, so that we can see what's going on a bit more clearly.

Avoid creating events with huge numbers of prev_events

... this should protect us from being dossed by people making silly events
(deliberately or otherwise)

In most cases, we limit the number of prev_events for a given event to 10
events. This fixes a particular code path which created events with huge
numbers of prev_events.

and a six.range change which I missed the last time

Signed-off-by: Adrian Tschira <nota@notafile.com>

This is a mixed commit that fixes various small issues

 * print parentheses
 * 01 is invalid syntax (it was octal in py2)
 * [x for i in 1, 2] is invalid syntax
 * six moves

Signed-off-by: Adrian Tschira <nota@notafile.com>

Signed-off-by: Adrian Tschira <nota@notafile.com>

There's more where that came from

Signed-off-by: Adrian Tschira <nota@notafile.com>

These worked accidentally before (python2 doesn't complain if you
compare incompatible types) but under py3 this blows up spectacularly

Signed-off-by: Adrian Tschira <nota@notafile.com>

Doing this I learned e.message was pretty shortlived, added in 2.6,
they realized it was a bad idea and deprecated it in 2.7

Signed-off-by: Adrian Tschira <nota@notafile.com>

Signed-off-by: Silke Hofstra <silke@slxh.eu>

fix federation_domain_whitelist

we were checking the wrong server_name on inbound requests