sendrecv: split the I/O handling into private handler

Howard Chu brought the bulk work of this patch that properly
moves out the sending and recving of data to the parts of the
code

sendrecv: split the I/O handling into private handler

Howard Chu brought the bulk work of this patch that properly
moves out the sending and recving of data to the parts of the
code that are properly responsible for the various ways of doing
so.

Daniel Stenberg assisted with polishing a few bits and fixed some
minor flaws in the original patch.

Another upside of this patch is that we now abuse CURLcodes less
with the "magic" -1 return codes and instead use CURLE_AGAIN more
consistently.

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Curl_setup_transfer: no longer returns anything

This function could only return CURLE_OK and by changing it to
a void instead, we can simplify code all over.

Curl_perform: Value stored to 'res2' is never read

Make rate-limitation logic smoother

This gives a smoother rate limitation performance by using
sub-second pauses and also taking the buffer sizes into
account.

fix: timeout after last data chunk was handled

Bob Richmond: There's an annoying situation where libcurl will
read new HTTP response data from a socket, then check if it's a
timeout

fix: timeout after last data chunk was handled

Bob Richmond: There's an annoying situation where libcurl will
read new HTTP response data from a socket, then check if it's a
timeout if one is set. If the last packet received constitutes
the end of the response body, libcurl still treats it as a
timeout condition and reports a message like:

"Operation timed out after 3000 milliseconds with 876 out of 876
bytes received"

It should only a timeout if the timer lapsed and we DIDN'T
receive the end of the response body yet.

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remove the CVSish $Id$ lines

indent fix by Ben Greear, I removed some braces for single-line conditional
expressions

- Based on patch provided by Jacob Moshenko, the transfer logic now properly
makes sure that when using sub-second timeouts, there's no final bad 1000ms
wait. Previously, a sub-second tim

- Based on patch provided by Jacob Moshenko, the transfer logic now properly
makes sure that when using sub-second timeouts, there's no final bad 1000ms
wait. Previously, a sub-second timeout would often make the elapsed time end
up the time rounded up to the nearest second (e.g. 1s for 200ms timeout)

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fix printf-style format strings

Fix compiler warnings: conversion from 'const int ' to 'unsigned char ', possible loss of data

Fix compiler warning: conditional expression is constant

RTSP followup fix. Both the pipelined and non-pipelined case need to
check for (excess > 0 && !k->ignorebody).

fix printf-style format strings

fix printf-style format strings

Chris Conroy's RTSP followup fixes

fix compiler warning

wrap long lines, remove (very old) attribution from code

Chris Conroy brought support for RTSP transfers, and with it comes 8(!) new
libcurl options for controlling what to get and how to receive posssibly
interleaved RTP data. Initial commit.

removed a parameter from the Curl_http_readwrite_headers() prototype to remove
the need for the struct forward declaration from http.h which caused problems
with gcc 2.96 and quite frankly th

removed a parameter from the Curl_http_readwrite_headers() prototype to remove
the need for the struct forward declaration from http.h which caused problems
with gcc 2.96 and quite frankly the parameter wasn't necessary anyway

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moved the SMTP payload escape function into Curl_smtp_escape_eob and put
it in smtp.c

(SMTP) support DATA better in the server and make sure to "escape" CRLF.CRLF
sequences in uploaded data. The test server doesn't "decode" escaped dot-lines
but instead test cases must be writ

(SMTP) support DATA better in the server and make sure to "escape" CRLF.CRLF
sequences in uploaded data. The test server doesn't "decode" escaped dot-lines
but instead test cases must be written to take them into account. Added test
case 803 to verify dot-escaping.

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move HTTP-specific functions to http.c where they belong

introducing IMAP, POP3 and SMTP support (still lots of polish left to do)

Prevent rewinding unless pipelining.

See http://curl.haxx.se/mail/lib-2009-12/0107.html

Add missing variable initialization