Adds one or more named download specifications to the fundsr.fund_urls
option. Existing entries are preserved; entries in fund_urls replace any
existing entries with the same name.
Value
Invisibly returns a named list (as returned by fundsr_options())
containing the previous value of fundsr.fund_urls.
See also
fundsr_options() to set fundsr.fund_urls and other fundsr options in one call.
download_fund_data() to download files from the added URLs.
Other download functions:
download_fund_data()
