Added CURLOPT_BUFFERSIZE

Added --limit-rate

HAVE_SYS_POLL_H

CURLOPT_BUFFERSIZE allows an application to set a prefered buffer size
for receiving data from the network. It is meant as a hint, not as a forced
limit.

Chris Combes added description of his newly added options

- Yarram Sunil found out that the SocketIsDead() function performed a lot
faster on Windows when removing the 1 microsecond timeout.

Hanno L. Kranzhoff fixed them

Remade the FTP not-check status line and not-attempt-to-read-status-line
variables, conditions and things.

Tom Mattison's report found out, and this is the fix that should prevent
FTP from closing the connections a little too often!

Miklos Nemeth added a section for how to disable specific protocols in the
windows build.

Miklos Nemeth fixed the mmlib

7.9.8 commit

Added 'dont_check' to be set during an FTP operation if the final status
message is supposed to be ignored.

when no FTP transfer was done, don't attempt to read the download transfer
thing. The 'resumed' flag is also causing confusions. I'll deal with that
tomorrow.

Moved the secondarysocket cleanup. The 'conn' struct may have been cleared
already at that other place.

Chris Combes added CURLFORM_BUFFER, CURLFORM_BUFFERPTR, CURLFORM_BUFFERLENGTH

fixing builds, patching bugs, adding curl_formadd() options

HAVE_SIGSETJMP

added a connect failure error message that might get empty otherwise

J�rn fixes for 7.9.8 build

CURLOPT_MAXFILESIZE

kris@freebsd.org fixed a bad format string

kris@freebsd.org fixed a few bad format strings

Add QNX

put #ifdefs around the sigjmp_buf declaration too, as it should be