THRIFT-4084: Add a SSL/TLS negotiation check to crossfeature to verify SSLv3 is not active and that at least one of TLSv1.0 through 1.2 are accepted.
Client: csharp, d, go, nodejs, perl

This closes #1197
diff --git a/test/features/tls.sh b/test/features/tls.sh
new file mode 100755
index 0000000..dada6ab
--- /dev/null
+++ b/test/features/tls.sh
@@ -0,0 +1,71 @@
+#!/bin/bash
+
+#
+# Checks to make sure TLSv1.0 or later is allowed by a server.
+#
+
+THRIFTHOST=localhost
+THRIFTPORT=9090
+
+while [[ $# -ge 1 ]]; do
+  arg="$1"
+  argIN=(${arg//=/ })
+
+  case ${argIN[0]} in
+    -h|--host)
+    THRIFTHOST=${argIN[1]}
+    shift # past argument
+    ;;
+    -p|--port)
+    THRIFTPORT=${argIN[1]}
+    shift # past argument
+    ;;
+    *)
+          # unknown option ignored
+    ;;
+  esac
+
+  shift   # past argument or value
+done
+
+declare -A EXPECT_NEGOTIATE
+EXPECT_NEGOTIATE[tls1]=1
+EXPECT_NEGOTIATE[tls1_1]=1
+EXPECT_NEGOTIATE[tls1_2]=1
+
+failures=0
+
+function tls
+{
+  for PROTO in "${!EXPECT_NEGOTIATE[@]}"; do
+
+    local nego
+    local negodenied
+    local res
+
+    echo "openssl s_client -connect $THRIFTHOST:$THRIFTPORT -CAfile ../keys/CA.pem -$PROTO 2>&1 < /dev/null"
+    nego=$(openssl s_client -connect $THRIFTHOST:$THRIFTPORT -CAfile ../keys/CA.pem -$PROTO 2>&1 < /dev/null)
+    negodenied=$?
+    echo "result of command: $negodenied"
+
+    res="enabled"; if [[ ${EXPECT_NEGOTIATE[$PROTO]} -eq 0 ]]; then res="disabled"; fi
+
+    if [[ $negodenied -ne ${EXPECT_NEGOTIATE[$PROTO]} ]]; then
+      echo "$PROTO negotiation allowed"
+    else
+      echo "[warn] $PROTO negotiation did not work"
+      echo $nego
+      ((failures++))
+    fi
+  done
+}
+
+tls
+
+if [[ $failures -eq 3 ]]; then
+  echo "[fail] At least one of TLSv1.0, TLSv1.1, or TLSv1.2 needs to work, but does not"
+  exit $failures
+fi
+
+echo "[pass] At least one of TLSv1.0, TLSv1.1, or TLSv1.2 worked"
+exit 0