I ran an evergreen patch for something totally unrelated to TLS, and got a test failure in
/TLS/commonName.

Here's the failure:

 [2016/08/05 15:05:41.524] Assertion failed: r == wiov_many[0].iov_len * NUM_IOVECS, file tests\ssl-test.c, line 251
 [2016/08/05 15:05:41.541]     { "status": "FAIL", "test_file": "/TLS/commonName", "seed": "1470423146", "start": 1342.497000000, "end": 1344.619000000, "elapsed": 2.122000000 },
 [2016/08/05 15:05:41.541] Begin /TLS/altname

Here's the whole log:
https://evergreen.mongodb.com/task/mongo_c_driver_windows_64_vs2010_integration_test_2.6_sharded_cd4c2b4f636baca5719614fe9e82ff37a336090b_16_08_05_18_07_34

I couldn't find a waterfall build/"base patch" which had this error. We should at least update the test use ASSERT_CMPINT (r, ==, wiov_many[0].iov_len * NUM_IOVECS) so we can get what the value of r was instead the next time it fails.