If several connection attempts are required Sikuli may not be able to
find the #tails channel because several server notice tabs are to the
left of it. To work around this we'll focus the conversation window and
close tabs until the channel tab appears.

Will-fix: #9517

Sometimes xdotool will fail to focus the buddy list window with the
conversation window on top of it. We'll try closing the conversation
window.

If we fail to connect to OFTC we'll use Vidalia to force a new Tor
circuit then attempt to reconnect.

Will-fix: #9517

This should allow some tests which fail due to transient network errors
to succeed if re-run after requesting a new Tor circuit.

Fix-committed: #9317

Fix-committed: #9568

Fix-committed: #9479

Fix-committed: #9329

The root user has special memory overcommit rules that may allow it to
allocate memory enough to make the system unusable. Let's run fillram
as a non-root user instead, to prevent the VM from stalling.

Previously we set oom_kill_allocating_task so the allocating process
would be OOM killed. If we're really unlucky, that could be some other
vital process, like the remote shell. Now we do not set
oom_kill_allocating_task and instead set a high oom_adj for each
fillram process instead.

The remote shell script name has changed, but we used the old name, so
we actually never set the oom_adj for it. Behold the power of
execute_successfully(), which discovered this issue!

The kernel documentation says [1] that "if you set this to lower than
1024KB, your system will become subtly broken, and prone to deadlock
under high loads." This may explain why the VM sometimes becomes
unrepsonsive, so let's not do that.

[1] https://www.kernel.org/doc/Documentation/sysctl/vm.txt

Fix-committed: #7249

Fix-committed: #9066

Merge remote-tracking branch 'origin/bugfix/9126-deny-tor-browser-access-to-recently-used' into stable

Fix-committed: #9126

Fix-committed: #9364

Fix-committed: #9523

And then: drop our own copy of that script, and adjust setup documentation
accordingly.

Will-fix: #9066

Will-fix: #9126

Fix-committed: #9406

Otherwise, a Wheezy builder fails to build a Jessie ISO, and vice-versa, because
Wheezy's and Jessie's eatmydata put their LD_PRELOAD'ed libraries in
different places.

Will-fix: #9523

Fix-committed: #9344

Fix-committed: #9355

Fix-committed: #9286

Merge remote-tracking branch 'origin/test/9425-enable-spice-and-asbolute-pointing-device' into stable

Fix-committed: #9425

Failing to focus the window before trying to activate the channel tab
can result in the Buddy List/Roster window covering the window that we
need to interact with.

Will-fix: #9317

The tests will sometimes fail becase of errors communicating with the
keyservers and because of Seahorse segfaulting. The purpose of this
helper function is to make the cause of such failures easily evident.

(Related to #8298)

Will-fix: #9344