spicy-redis: Add synchronization and pipeline support

Also adds some command support

testing/btest/scripts/base/protocols/redis/django-cloud.zeek

@@ -0,0 +1,15 @@
+# @TEST-DOC: Test Redis traffic from a django app using Redis (in the cloud) as a cache
+#
+# @TEST-EXEC: zeek -Cr $TRACES/redis/django-cloud.trace base/protocols/redis %INPUT >output
+# @TEST-EXEC: btest-diff output
+# @TEST-EXEC: btest-diff resp.log
+
+redef RESP::ports += {
+    10625/tcp,
+};
+
+event RESP::set_command(c: connection, is_orig: bool, command: RESP::SetCommand)
+    {
+    # Print the whole command because these have extra data that's worth capturing.
+    print fmt("SET: %s %s expires in %d milliseconds", command$key, command$value, command$px);
+    }