Use captchas closer to expiring first. #618

src/Posting/Captcha.v1.coffee

@@ -154,6 +154,7 @@ Captcha.v1 =
       challenge: @nodes.img.alt
       response:  response
       timeout:   @timeout
+    @captchas.sort (a, b) -> a.timeout - b.timeout
     @count()
     @destroy()
     @setup false, true

src/Posting/Captcha.v2.coffee

@@ -183,6 +183,7 @@ Captcha.v2 =
     @captchas.push
       response: token or $('textarea', @nodes.container).value
       timeout:  Date.now() + @lifetime
+    @captchas.sort (a, b) -> a.timeout - b.timeout
     $.set 'captchas', @captchas
     @count()