AmphetaDesk allows an RSS URL to be passed as a GET
parameter for subscription like so:
Unfortunately, if a passed URL has its own query string:
then AmphetaDesk sees the ?items as something it should
treat as its own (thus, it'll be stripped off the passed URL).
Likewise, CGI.pm seems to try very hard to parse key/value
pairs, as even encoded URLs are treated this way (though,