linked to the networking libraries.

and those required by other components to avoid forcing unneeded
dependencies into the target objects.

  CURLOPT_RANGE back to no range on an easy handle when using FTP.

making them available to any source code file which includes "setup.h".

Macro SOCKERRNO / SET_SOCKERRNO() returns / sets the *socket-related* errno
(or equivalent) on this platform to hide platform details to code using it.

Macro ERRNO / SET_ERRNO() returns / sets the NOT *socket-related* errno
(or equivalent) on this platform to hide platform details to code using it.

FD_ISSET, and FD_ZERO macros emits warnings #1469 and #593.
So for icc 9.0 we also ignore warnings #1469 and #593.
* 593 warns on "variable __d0 was set but never used"
* 1469 warns on "cc clobber ignored"

build targets when --disable-verbose is specified.

macro to provide this functionality on all platforms

dependencies to applications.

retrying upon EINTR errors.

the left side of @ to make it short(er).

  gmtime_r() like the older VC versions. He also made use of some machine-
  specific defines to differentiate the "OS" define.

provide a suitable replacement for use in our ISBLANK macro

DNS from /etc/nsswitch.conf, /etc/host.conf or /etc/svc.conf when
/etc/resolv.conf did not exist or was unable to read it.