Log some more error descriptions.

added go_sleep() to util.c.

Check for lowercase 'bool' type at configuration stage. If not available
provide a suitable replacement with a type definition of 'unsigned char'
in setup_once.h

Move definitions of TRUE and FALSE to setup_once.h

to verify winsock API availability.

all Win32 targets except CygWin. Cleanup.

windows.h winsock.h winsock2.h ws2tcpip.h is done in setup.h

Added resolve.c to simply resolve a given host name

and sockfilt.c. For good-to-have functions for the servers written in C.

week day names and month names and servers don't like that.

with binary data.

in a slightly better way for more platforms. The $HOME is only used for
.curlrc atm, but the possible upcoming change of .netrc treatment may also
need the home dir.