changelog of the current development status, as one or more of these problems
may have been fixed since this was written!
+79. SMTP. When sending data to multiple recipients, curl will abort and return
+ failure if one of the recipients indicate failure (on the "RCPT TO"
+ command). Ordinary mail programs would proceed and still send to the ones
+ that can receive data. This is subject for change in the future.
+ http://curl.haxx.se/bug/view.cgi?id=3438362
+
78. curl and libcurl don't always signal the client properly when "sending"
zero bytes files - it makes for example the command line client not creating
any file at all. Like when using FTP.