webdav_put: PUT new file on WebDAV server
In maxheld83/webdav: Access WebDAV servers

PUTs new file into a WebDAV drive, in the HTTP sense: Existing files at the same url are overwritten. Will retry as per httr::RETRY().

1	webdav_put(local, remote, user, password, keyring)

`local`	`character[1]`, giving the path to the local file to upload.
`remote`	`character[1]`, giving the path to the file to create or overwrite on the WebDAV server. Remember to include the target filename.
`user`	`[character(1)]` giving the username to authenticate with, for example `"jane"`. Also used to retrieve from and store the password in `keyring`.
`password`	`[character(1)]` giving the password. Use this to substitute in an environment variable such as `Sys.getenv("SECRET")`. Recommended only when the environment variable is declared in an encrypted form, and when it is redacted from the logs. Do not expose your passwords in scripts or the R console. Defaults to `NULL`, in which case the `keyring` is used.
`keyring`	For systems that support multiple keyrings, specify the name of the keyring to use here. If `NULL`, then the default keyring is used. See also `has_keyring_support()`.