v1.9.7

Uprev githttp to v2.4.8 (#36)

This fixes logging and allows access to trees+paths

v1.9.6

Uprev githttp to v2.4.6 (#35)

This change finally allows the grader and gitserver to no longer _need_
to be colocated in the exact same machine.

v1.9.5

Add a way for the grader to request problems (#34)

v1.9.4

Uprev githttp to v2.4.4 (#33)

v1.9.3

Add a 2-minute timeout to all requests (#32)

Upstream has a 2-minute timeout, so we shouldn't try to keep things
alive any longer.

v1.9.2

Automatically uprev the sandbox image versions (#31)

This will allow us to not do this by hand.

v1.9.1

Fix the health test (#30)

We were previously using the `sumas` problem for health tests. The
problem is that this is not always created. Furthermore, this makes it
possible for an exploit to mess with a production problem! So now we are
using the problem called `:testproblem` (with a colon at the beginning),
which is clearly not a valid problem name. This means that the very
first healthcheck request will create this problem, giving the extra
advantage of also testing for writability.

v1.9.0

Use the new logging interface throughout (#29)

No more explicit references to log15! #minor

v1.8.11

Add even more tracing (#28)

Now every function that interacts with git2go should in theory be
traced, both here and in githttp.

v1.8.10

Add a few segments to the distributed traces (#27)

This change uses the new tracing interface to add a few segments to the
traces, as well as plumbing the tracing provider object all the way to
githttp.