huge send buffer sizes

persistent connection. Mentioned by Immanuel Gregoire on the mailing list.

forwarded from the Gentoo bug tracker by Daniel Black and was originally
submitted by Robin Johnson, pointed out that libcurl would do bad memory
references when it failed and bailed out before the handler thing was
setup. My fix is not done like the provided patch does it, but instead I
make sure that there's never any chance for a NULL pointer in that struct
member.

This also defines it for WinCE even though it is a subset of WIN32.

out that SFTP requests didn't use persistent connections. Neither did SCP
ones.  I gave the SSH code a good beating and now both SCP and SFTP should
use persistent connections fine. I also did a bunch for indent changes as
well as a bug fix for the "keyboard interactive" auth.

while () => while()
and some other minor re-indentings

callbacks needed to pass a buffer to the user.  Instead one per byte it
is now as little as one per segment.

consistency

connectdata struct. This will in theory enable us to do persistent connections
with SCP+SFTP, but currently the state machine always (and wrongly) cleanup
everything in the 'done' action instead of in 'disconnect'. Also did a bunch
of indent fixes, if () => if() and a few other source cleanups like added
comments etc.

headers <winlap.h> and <winber.h> defines wrong calling convention.

Use a response-file for the C-compiler.

Moved Curl_file_connect into the protocol handler struct.

Added generation of dummy ca-bundle.h. Sorted objects.

Previously it would fail if the ca bundle wasn't present, even if the code
ignored the verification results.

so do the data->reqdata.current_conn assignment when we know there is an easy
handle existing! Fixes the valgrind report on test 509.

was even mentioned to be bad in a comment! Should make test 2000 and 2001 work
fine.

Also, freedirs() now take a ftp_conn struct pointer which saves some extra
unnecessary variable assignments.

versions of ws2tcpip.h do not have the definition. It seems that when
the socklen_t definition is missing from ws2tcpip.h the definition for
INET_ADDRSTRLEN is also missing, and that when one definition is present
the other one also is available.

that libcurl tried to re-use connections a bit too much when using non-SSL
protocols tunneled over a HTTP proxy.