Bump version to 3.4.3
Disable ContentPolicy callbacks, if channel.redirecTo() is available.

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=939180

This is implemented in 3.x by keeping the callbacks but not actually using
them.  For elegance and performance we should probably not register for them at
all, but I'm a little unsure about whether the version-comparator service might
take a while to appear during startup.

4.x has a better solution, which is to never register and simply be
incompatible with FF < 20.
Merge Changelog for 4.0development.14

Conflicts:
	src/Changelog
[major ui bugfix] Unbreak common case Observatory UI

Users who click "yes" to the observatory popup, who don't have Tor, and never
examine the privacy / details window, wouldn't actually have a working
Observatory state :(
Update cert whitelist
Start changelog for 3.4.3
[AmazonAWS.xml] Exclusion for spiegel.tv (9735)
Merge remote-tracking branch 'yan/fix/9735' into 3.0
[OpenDNS] JS redirect loop, disable

https://lists.eff.org/pipermail/https-everywhere-rules/2013-November/001736.html
[MobyGames] disable until a workable fix is in.

https://lists.eff.org/pipermail/https-everywhere-rules/2013-November/001733.html
[Behance] Disable due to 302 redirect loop
[Kohls] Disable due to 302 redirect loop
[BarnesandNoble] Disable due to 302 redirect loop
[Behance] Add reason for turning off
Merge remote-tracking branch 'yan/fix/3.0-redirects' into 3.0
Final changelog for 3.4.3?
Bump maxVersion from FF 25 to 28