Dan Fandrich fix: eliminates some pedantic CodeWarrior compiler warnings and
errors.

Prevent a longjmp warning by moving the rc assign within Curl_resolv().
Andy Cedilnik reported. Warning on HP-UX?

removed tabs and trailing whitespace from source

Made the dns entry remain locked while a connection to the host remains to
allow verbose output during this period. Bertrand Demiddelaer reported and
helped fixing.

the _num_chars() function is not used, removing

Replaced all uses of sprintf() with the safer snprintf(). It is just a
precaution to prevent mistakes to lead to buffer overflows.

made the Curl_he2ai() take the port number as an int intead, to avoid lots
of typecasts all over

prevent warning

Source cleanups. The major one being that we now _always_ use a Curl_addrinfo
linked list for name resolved data, even on hosts/systems with only IPv4
stacks as this simplifies a lot of code.

removed trailing whitespace

Gisle corrected two comments

Gisle Vanem's improved verbose output and timeout handling when connecting to
a host name that resolves to multiple IP addresses.

if shrinking the buffer fails, use the older larger one

curl_global_init_mem() allows the memory functions to be replaced.
memory.h is included everywhere for this.

improved the cleaning up of memory when we fail to resolve names due to
out of memory (thanks to 'runtests.pl -t')

Made defines instead of plain numbers for the Curl_resolv() return code to
make the code easier to read

Major hostip.c cleanup and split into multiple files and easier #ifdef
usage.

Gisle Vanem found and fixed a memory leak when doing (failing) Windows
threaded name resolves.

include unistd.h as well for the close() proto on some platforms (like Tru64)

cleanup leftovers

asking for CURL_IPRESOLVE_V6 when ipv6 addresses can't be resolved will
now cause the resolve function to return NULL immediately

Curl_wait_for_resolv() could hang due to the bad timeout timer resolution and
some bad thinking on my part.

Gisle Vanem's fix that makes the multi interface work on Windows again even
when not using ares.

somewhat safer typecasting in case sizeof(long) != sizeof(void *) (is there
even such platforms?)

the pack_hostent() proto isn't used/needed with ipv6 is enabled.

time to restructure this source file!