#27 URLs with QUERY_STRINGs Are Treated As Our Own

[Morbus Iff]

AmphetaDesk allows an RSS URL to be passed as a GET
parameter for subscription like so:

?add_url=http://this.is.it/index.rss

Unfortunately, if a passed URL has its own query string:

?add_url=http://this.is.it/index.rss?items=20

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,
double-check this).