When closing a connection, the speedchecker's timestamp is now deleted
so that it cannot accidentally be used by a fresh connection on the same
handle when examining the transfer speed.

Bug: https://bugzilla.redhat.com/679709

When a time condition isn't met, so that no body is delivered to the
application even though a 2xx response is being read from the server, we
must close the connection to avoid a re-use of the connection to be
completely tricked.

Added test 1128 to verify.

Typecasts added since I changed more code to use long for timeouts

It was mostly typecasted to int all over the code so switching to long
instead all over should be a net gain.

cross-compilation of unit tests static library/programs fails when
libcurl shared library is also built. This might be due to a libtool or
automake issue. In this case we disable unit tests.

I removed the prefix as well accordingly.

Fix compiler warning: cast increases required alignment

Due to some flaw in roffit I removed some style changes to make the web
page look better.

Bug: http://curl.haxx.se/bug/view.cgi?id=3307835

Currently, Windows cross-compiled autobuilds require inclusion of setup.h
before curl.h to get definitions of CURL_STATICLIB and BUILDING_LIBCURL.

Source files given with relative paths do not have the
-D directory specifier prepended.

Fix compiler warning: conversion may lose significant bits

Fix compiler warning: variable was set but never used

Fix compiler warning: clobber ignored

Also define UNITTESTS macro when building unit test sources.

Fixing compiler warning: external definition with no prior declaration