update README
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M README +4 -0
@@ 3,6 3,10 @@ hgssh4
 A python3 script to control ssh access to mercurial repositories.
+This script was adapted from hgssh3.py in order to circumvent the "potentially
+unsafe" error that was arising when trying to pull repositories with readonly
+access. Source code for this comes from the updated version of `hg-ssh`.
 modified from hg-ssh (http://www.selenic.com/repo/hg-stable/raw-file/tip/contrib/hg-ssh)
 and hgssh2.py (https://github.com/dengzhp/hgssh2)