compiler warning fix

enhance HTTP server request input writing,
retrying upon EINTR errors.

Venkat Akella found out that libcurl did not like HTTP responses that simply
responded with a single status line and no headers nor body. Starting now, a
HTTP response on a persistent connect

Venkat Akella found out that libcurl did not like HTTP responses that simply
responded with a single status line and no headers nor body. Starting now, a
HTTP response on a persistent connection (i.e not set to be closed after the
response has been taken care of) must have Content-Length or chunked
encoding set, or libcurl will simply assume that there is no body.

To my horror I learned that we had no less than 57(!) test cases that did bad
HTTP responses like this, and even the test http server (sws) responded badly
when queried by the test system if it is the test system. So although the
actual fix for the problem was tiny, going through all the newly failing test
cases got really painful and boring.

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Tor Arntsen spotted this mistake

Avoid trying to compare more than strlen bytes.

Replace is*() macros with our own IS*() ones.

Remove redundant __CYGWIN__ symbol check

Cygwin preprocessor adjustments

test 530 is the first ever HTTP pipelining test for libcurl

Replace exit() with return() in main()

Abort if unable to write pid file.

-Use curl_socket_t instead of int.

-Log errno in message if setsockopt() fails.

-Close listener socket on major errors.

Fix compiler warning: comparison between signed and unsigned

Place parenthesis surrounding macro parameters so that the use of sread and swrite is more intuitive.

Pay attention when typecasting an operation

sread now returns ssize_t

Use platform's native types for recv() and send() arguments.

removed variable declarations shadowing previously declared variables

if configure found a fork(), sws supports --fork which is *NOT* used by the
ordinary test suite. Also removed the perror() calls and instead made the
logging output the errno code to ease err

if configure found a fork(), sws supports --fork which is *NOT* used by the
ordinary test suite. Also removed the perror() calls and instead made the
logging output the errno code to ease error tracking using logs.

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Fix typo.

Ulf H�rnhammar fixed a format string (printf style) problem in the Negotiate
code. It should however not be the cause of any troubles. He also fixed a
few similar problems in the HTTP test se

Ulf H�rnhammar fixed a format string (printf style) problem in the Negotiate
code. It should however not be the cause of any troubles. He also fixed a
few similar problems in the HTTP test server code.

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Made the copyright year match the latest modification's year.

modified to hush compiler warnings

1. sws now supports two new "commands" and 2. if built with
CURL_SWS_FORK_ENABLED defined it forks for each new connection and thus can
support any amount of connection clients (used for hipe

1. sws now supports two new "commands" and 2. if built with
CURL_SWS_FORK_ENABLED defined it forks for each new connection and thus can
support any amount of connection clients (used for hiper tests and not for the
standard plain curl test suite)

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moved test2file() to util.c