More LFS notes

contrib/filter-repo-demos/lfs-conversion

@@ -185,4 +185,12 @@ https://github.com/bozaro/git-lfs-migrate/issues/32
 https://github.com/git-lfs/git-lfs/tree/master/docs
 https://github.com/git-lfs/git-lfs/blob/master/docs/api/server-discovery.md
 https://github.com/git-lfs/git-lfs/blob/master/docs/spec.md
+
+
+https://github.com/git-lfs/git-lfs/issues/1589
+https://github.com/rtyley/bfg-repo-cleaner/issues/197
+https://github.com/rtyley/bfg-repo-cleaner/issues/116
+https://github.com/rtyley/bfg-repo-cleaner/issues/143
+
+https://stackoverflow.com/questions/33671523/git-bfg-to-retroactively-enable-lfs-protected-commits-issue
 '''