sends the 220 response or otherwise is dead slow, libcurl will not
acknowledge the connection timeout during that phase but only the "real"
timeout - which may surprise users as it is probably considered to be the
connect phase to most people. Brought up (and is being misunderstood) in:
http://curl.haxx.se/bug/view.cgi?id=2844077
changelog of the current development status, as one or more of these problems
may have been fixed since this was written!
+73. if a connection is made to a FTP server but the server then just never
+ sends the 220 response or otherwise is dead slow, libcurl will not
+ acknowledge the connection timeout during that phase but only the "real"
+ timeout - which may surprise users as it is probably considered to be the
+ connect phase to most people. Brought up (and is being misunderstood) in:
+ http://curl.haxx.se/bug/view.cgi?id=2844077
+
72. "Pausing pipeline problems."
http://curl.haxx.se/mail/lib-2009-07/0214.html