- Linus Nielsen Feltzing reported and helped me repeat and fix a problem with

FTP with the multi interface: when a transfer fails, like when aborted by a
  write callback, the control connection was wrongly closed and thus not
  re-used properly.

  This change is also an attempt to cleanup the code somewhat in this area, as
  now the FTP code attempts to keep (better) track on pending responses
  necessary to get read in ftp_done().

RELEASE-NOTES

@@ -47,6 +47,6 @@ advice from friends like these:
  Lisa Xu, Daniel Fandrich, Craig A West, Alexey Borzov, Sharad Gupta,
  Peter Sylvester, Chad Monroe, Markus Moeller, Yang Tse, Scott Cantor,
  Patrick Scott, Hidemoto Nakada, Jocelyn Jaubert, Andre Guibert de Bruet,
- Kamil Dudka, Patrik Thunstrom
+ Kamil Dudka, Patrik Thunstrom, Linus Nielsen Feltzing
 
         Thanks! (and sorry if I forgot to mention someone)