Prior to openssh 6.4, ssh-keygen -F returned 0 (and no output) when no
host was found. After then, it instead returned 1 and no output. This
revised code behaves correctly with either behaviour. There is
currently no other code path that results in exit(1) and no output.
These are all the code changes from Brian's review:
* change #! line
* rename "host" to "name" [keep as alias]
* make documentation clearer
* imports 1 per line
* use get_bin_path to find ssh-keygen
* key not actually required when removing host
The known_hosts module lets you add or remove a host from the
known_hosts file. This is useful if you're going to want to use the
git module over ssh, for example. If you have a very large number of
host keys to manage, you will find the template module more useful.
This was pull request 7840 from the old ansible repo, which was
accepted-in-principle but not yet merged. The mailing list thread
reading it is:
https://groups.google.com/forum/#!topic/ansible-devel/_e7H_VT6UJE/discussion
