[WIP] Partial bot skeleton, non-functional though

vendor/github.com/DataDog/zstd/external_zstd.go

@@ -0,0 +1,14 @@
+//go:build external_libzstd
+// +build external_libzstd
+
+package zstd
+
+// #cgo CFLAGS: -DUSE_EXTERNAL_ZSTD
+// #cgo pkg-config: libzstd
+/*
+#include<zstd.h>
+#if ZSTD_VERSION_NUMBER < 10400
+#error "ZSTD version >= 1.4 is required"
+#endif
+*/
+import "C"