Properly handle alerts from the peer in SSL_read.

third_party/tlslite/patches/alert_after_handshake.patch

+diff --git a/third_party/tlslite/tlslite/handshakesettings.py b/third_party/tlslite/tlslite/handshakesettings.py
+index 2f11aaa..e752834 100644
+--- a/third_party/tlslite/tlslite/handshakesettings.py
++++ b/third_party/tlslite/tlslite/handshakesettings.py
+@@ -107,6 +107,10 @@ class HandshakeSettings(object):
+     
+     @type useExperimentalTackExtension: bool
+     @ivar useExperimentalTackExtension: Whether to enabled TACK support.
++
++    @type alertAfterHandshake: bool
++    @ivar alertAfterHandshake: If true, the server will send a fatal
++    alert immediately after the handshake completes.
+     
+     Note that TACK support is not standardized by IETF and uses a temporary
+     TLS Extension number, so should NOT be used in production software.
+@@ -124,6 +128,7 @@ class HandshakeSettings(object):
+         self.tlsIntolerant = None
+         self.tlsIntoleranceType = 'alert'
+         self.useExperimentalTackExtension = False
++        self.alertAfterHandshake = False
+ 
+     # Validates the min/max fields, and certificateTypes
+     # Filters out unsupported cipherNames and cipherImplementations
+@@ -140,6 +145,7 @@ class HandshakeSettings(object):
+         other.maxVersion = self.maxVersion
+         other.tlsIntolerant = self.tlsIntolerant
+         other.tlsIntoleranceType = self.tlsIntoleranceType
++        other.alertAfterHandshake = self.alertAfterHandshake
+ 
+         if not cipherfactory.tripleDESPresent:
+             other.cipherNames = [e for e in self.cipherNames if e != "3des"]
+diff --git a/third_party/tlslite/tlslite/tlsconnection.py b/third_party/tlslite/tlslite/tlsconnection.py
+index 0e13a78..eb850e9 100644
+--- a/third_party/tlslite/tlslite/tlsconnection.py
++++ b/third_party/tlslite/tlslite/tlsconnection.py
+@@ -1221,6 +1221,10 @@ class TLSConnection(TLSRecordLayer):
+             ocspResponse=ocspResponse)
+         for result in self._handshakeWrapperAsync(handshaker, checker):
+             yield result
++        if settings and settings.alertAfterHandshake:
++            for result in self._sendError(AlertDescription.internal_error,
++                                          "Spurious alert"):
++                yield result
+ 
+ 
+     def _handshakeServerAsyncHelper(self, verifierDB,