av-filter encrypts and decrypts YAML file values with ansible-vault and was
created by Todd Lewis
to encrypt only string values. I did some refactoring to provide encryption of
all values and preservation of quotes and control characters in strings.
Unfortunately, Ansible does not reparse decrypted YAML values, which are strings,
by default. They can be converted to non-string values with a filter. For example:
my_value: "{{ vault.value | int }}". But quoted strings will decrypt to include