Fixed a couple of compile warnings.

Moved all signal-based name resolution timeout handling into a single new
Curl_resolv_timeout function to reduce coupling.

ntoa() and inet_ntoa_r() no longer used

remove unnecessary typecasting of calloc()

Removed some redundant type casts

- Andreas Schuldei improved Phil Blundell's patch for IPv6 using c-ares, and I
edited it slightly. Now you should be able to use IPv6 addresses fine even
with libcurl built to use c-ares.

- Dmitry Popov filed bug report #1911069
(http://curl.haxx.se/bug/view.cgi?id=1911069) that identified a race
condition in the name resolver code when the DNS cache is shared between

- Dmitry Popov filed bug report #1911069
(http://curl.haxx.se/bug/view.cgi?id=1911069) that identified a race
condition in the name resolver code when the DNS cache is shared between
multiple easy handles, each running in simultaneous threads that could cause
crashes.

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Woops, partly revert my previous commit and do it slightly differently instead.
The signalling of that a global DNS cache is wanted is done by setting the
option but the setting of the intern

Woops, partly revert my previous commit and do it slightly differently instead.
The signalling of that a global DNS cache is wanted is done by setting the
option but the setting of the internal variable that it is in use must not be
done until it finally actually gets used!

NOTE and WARNING: I noticed that you can't actually switch off the global dns
cache with CURLOPT_DNS_USE_GLOBAL_CACHE but you couldn't do that previously
either and the option is very clearly and loudly documented as DO NOTE USE so
I won't bother to fix this bug now.

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I made the torture test on test 530 go through. This was actually due to
silly code left from when we switched to let the multi handle "hold" the dns
cache when using the multi interface... O

I made the torture test on test 530 go through. This was actually due to
silly code left from when we switched to let the multi handle "hold" the dns
cache when using the multi interface... Of course this only triggered when a
certain function call returned error at the correct moment.

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if () => if()
while () => while()
and some other minor re-indentings

Renamed a variable to avoid shadowing a global declarations.

Fixed some minor mismatched types found by splint.

Thomas J. Moore provided a patch that introduces Kerberos5 support in
libcurl. This also makes the options change name to --krb (from --krb4) and
CURLOPT_KRBLEVEL (from CURLOPT_KRB4LEVEL) but

Thomas J. Moore provided a patch that introduces Kerberos5 support in
libcurl. This also makes the options change name to --krb (from --krb4) and
CURLOPT_KRBLEVEL (from CURLOPT_KRB4LEVEL) but the old names are still

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Robert Iakobashvili re-arranged the internal hash code to work with a custom
hash function for different hashes, and also expanded the default size for
the socket hash table used in multi han

Robert Iakobashvili re-arranged the internal hash code to work with a custom
hash function for different hashes, and also expanded the default size for
the socket hash table used in multi handles to greatly enhance speed when
very many connections are added and the socket API is used.

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Steve Little's fixes to allow compilation on VMS 64-bit mode

Removed inclusion of <sys/types.h> and <sys/stat.h> in .c-files
since they're already included through "setup.h".

curlassert macro replaced with DEBUGASSERT macro defined in setup_once.h

Workaround for Cray UNICOS 9.0 to fix ftp.

Minor portability fixes to get things running on UNICOS 9.0 on a Cray Y-MP

Fix warning: no newline at end of file

Simplify check for NEED_MALLOC_H, and make more explicit that NEED_MALLOC_H shall be defined if <malloc.h> header file must be included even when including <stdlib.h>.

Moved functions common to IPv4 and C-ares to hostip.c;
Curl_freeaddrinfo() and Curl_ip2addr().

Remove comment about c-ares not supporting IPv6.

Constify arguments to Curl_he2ai() and Curl_addrinfo_copy().

Constify 'hostname' and 'service' to various resolver functions.