docs: document test_ssl failure when using LibreSSL

Fortunately this seems pretty harmless.

Author: indygreg

docs/status.rst

@@ -25,6 +25,27 @@ used to run the Python test harness from a distribution archive.
 Here, we track the various known failures when running
 ``test-distribution.py /path/to/distribution.tar.zst -u all``.
 
+``test_ssl``
+------------
+
+Known failing on: Linux
+
+When building against LibreSSL instead of OpenSSL, ``test_ssl`` fails
+in the following manner::
+
+    ======================================================================
+    FAIL: test_openssl_version (test.test_ssl.BasicSocketTests)
+    ----------------------------------------------------------------------
+    Traceback (most recent call last):
+      File "/tmp/tmpinhxfy8t/python/install/lib/python3.7/test/test_ssl.py", line 573, in test_openssl_version
+        (s, t, hex(n)))
+    AssertionError: False is not true : ('LibreSSL 3.0.2', (2, 0, 0, 0, 0), '0x20000000')
+
+    ----------------------------------------------------------------------
+
+This seems to be the test assuming the existence of OpenSSL and not
+coping with LibreSSl. This failure seems pretty benign.
+
 ``test_subprocess``
 -------------------