Add tests for session cache and false start behavior.

third_party/tlslite/patches/ignore_write_failure.patch

Index: third_party/tlslite/patches/ignore_write_failure.patch
diff --git a/third_party/tlslite/patches/ignore_write_failure.patch b/third_party/tlslite/patches/ignore_write_failure.patch
new file mode 100644
index 0000000000000000000000000000000000000000..169e4d5871f9c17edd60f2357d5ff3786491eb30
--- /dev/null
+++ b/third_party/tlslite/patches/ignore_write_failure.patch
@@ -0,0 +1,15 @@
+diff --git a/third_party/tlslite/tlslite/tlsrecordlayer.py b/third_party/tlslite/tlslite/tlsrecordlayer.py
+index 8b92221..370dc9a 100644
+--- a/third_party/tlslite/tlslite/tlsrecordlayer.py
++++ b/third_party/tlslite/tlslite/tlsrecordlayer.py
+@@ -286,7 +286,9 @@ class TLSRecordLayer(object):
+         except GeneratorExit:
+             raise
+         except Exception:
+-            self._shutdown(False)
++            # Don't invalidate the session on write failure if abrupt closes are
++            # okay.
++            self._shutdown(self.ignoreAbruptClose)
+             raise
+ 
+     def close(self):