Split out -prune from -snapshot, tested the latter on various live setups.

1 files changed, 8 insertions, 0 deletions

diff --git a/README.md b/README.md
index 0773d05..325fb7a 100755
--- a/README.md
+++ b/README.md
@@ -167,3 +167,11 @@ daily backups, but as they get too numerous, we make sure that we are reluctant
 to delete our very oldest.
 
 [TODO: model it]
+
+Acknowledgements
+----------------
+For maximum portability, I've included two libraries.  Thanks very much to
+their authors:
+
+sys-filesystem by Daniel J. Berger: https://github.com/djberg96/sys-filesystem
+trollop by William Morgan: https://github.com/wjessop/trollop
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