package/putty: security bump version to 0.73

Added upstream-provided sha1 hash.

Changelog:
https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 71d2911e26a8e1df3b01ba3838adf0604c893d3e)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2 files changed