twitter stupidly "shortens" find.com into http://t.co/u44JiITiuc, cope

try to pluck out simple urls in basic tlds and treat their length as
a t.co url if it's longer than the url being shortened

of course this will not catch all urls, but i'm not going to load a
whole suffix list or library just to deal with this stupid shit

script/post_to_twitter

@@ -44,6 +44,11 @@ Time.now - 1.days).order(:id).each_with_index do |s,x|
     title = "- #{title}"
   end
 
+  # if there are any urls in the title, they should be sized (at least) to a
+  # twitter t.co url
+  left_len -= (title.scan(/[^ ]\.(com|org|net|edu)/i).map{|u| [ 0,
+    Twitter::TCO_LEN ].max }.inject(:+)).to_i
+
   if title.bytesize > left_len
     status = title[0, left_len - 3] + "..." + status
   else