Index: head/sys/contrib/zstd/FREEBSD-Xlist
===================================================================
--- head/sys/contrib/zstd/FREEBSD-Xlist	(nonexistent)
+++ head/sys/contrib/zstd/FREEBSD-Xlist	(revision 354373)
@@ -0,0 +1,12 @@
+$FreeBSD$
+
+.circleci
+.cirrus.yml
+.gitignore
+.travis.yml
+build
+contrib/linux-kernel
+contrib/single_file_decoder
+contrib/VS2005
+lib/dll
+programs/windres
Index: head/sys/contrib/zstd/FREEBSD-upgrade
===================================================================
--- head/sys/contrib/zstd/FREEBSD-upgrade	(nonexistent)
+++ head/sys/contrib/zstd/FREEBSD-upgrade	(revision 354373)
@@ -0,0 +1,14 @@
+$FreeBSD$
+
+zstd
+
+To import new vendor sources, prune unwanted files with:
+
+	tar -X FREEBSD-Xlist -xf zstd-x.y.z.tar.zst
+
+When importing a new version, be sure to check if there are any new bits that
+we don't want.
+
+Please find instructions for importing new releases and merging to HEAD here:
+
+https://www.freebsd.org/doc/en_US.ISO8859-1/articles/committers-guide/subversion-primer.html#idp45937784