<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
When I read the `copy` documentation, I couldn't work out what it meant.  Unfortunately, this meant it sounded like it might be a weird sex joke.

It doesn't sound like a big problem, but in an ideal world, I think we should prefer to avoid weird sex jokes in an alias for a parameter called `force`.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
copy

##### ADDITIONAL INFORMATION
Issue search tells me "thirsty" was added as an option to the `get_url` module.  In that context, it is appropriate.  But in the context of the `copy` module, it does not make sense, because `copy` only works in the upload direction.

The first three pages of Google Search results (Ansible thirsty) show people using "thirsty" for downloads only, not uploads.  Similarly for GitHub code search (copy thirsty language:YAML).
your proxy environment for both protocols is correct.
     - From Ansible 2.4 when run with C(--check), it will do a HEAD request to validate the URL but
       will not download the entire file or verify it against hashes.
     - For Windows targets, use the M(win_get_url) module instead.
version_added: '0.6'
options:
  url:
    description:
      - HTTP, HTTPS, or FTP URL in the form (http|https|ftp)://[user[:pass]]@host.domain[:port]/path
    type: str
    required: true
  dest:
    description:
      - Absolute path of where to download the file to.
      - If C(dest) is a directory, either the server provided filename or, if
        none provided, the base name of the URL on the remote server will be
        used. If a directory, C(force) has no effect.
      - If C(dest) is a directory, the file will always be downloaded
        (regardless of the C(force) option), but replaced only if the contents changed..
    type: path
    required: true
  tmp_dest:
    description:
      - Absolute path of where temporary file is downloaded to.
      - When run on Ansible 2.5 or greater, path defaults to ansible's remote_tmp setting
      - When run on Ansible prior to 2.5, it defaults to C(TMPDIR), C(TEMP) or C(TMP) env variables or a platform specific value.
      - U(https://docs.python.org/2/library/tempfile.html#tempfile.tempdir)
    type: path
    version_added: '2.1'
  force: