download.sh: add another sanity check (file url returned by module download function)
zippyshare (download): fix 'Private file' wrong filename
bayfiles: change TLD: .com => .net

Fixes issue 912
hotfile (download): minor, drop some _quiet function
core.sh (parse_attr): fix wrong behavior on unquoted attributes

Regression introduced in commit:
core.sh: rewrite parse_attr() to avoid pipe "|head -n1"
revision 3fc6afab50148e3b1f9fe9878c90d0c052a1511b
dl.free.fr (upload): add sanity check

Server can return a wrong monitoring url:
http://dl.free.fr/fo.html