remove unnecessary typecasting of realloc()

fix print formatting string directives

Made some variables const which eliminated some casts

libcurl internal base64.h header file renamed to curl_base64.h

libcurl internal md5.h header file renamed to curl_md5.h

Nikitinskit Dmitriy filed bug report #1868255
(http://curl.haxx.se/bug/view.cgi?id=1868255) with a patch. It identifies
and fixes a problem with parsing WWW-Authenticate: headers with additio

Nikitinskit Dmitriy filed bug report #1868255
(http://curl.haxx.se/bug/view.cgi?id=1868255) with a patch. It identifies
and fixes a problem with parsing WWW-Authenticate: headers with additional
spaces in the line that the parser wasn't written to deal with.

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A bug report on the curl-library list showed a HTTP Digest session going on
with a 700+ letter nonce. Previously libcurl only support 127 letter ones
and now I bumped it to 1023.

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

Fixed some minor type mismatches and missing consts mainly found by splint.

HTTP Digest auth fix on a re-used connection

Jose Kahan pointed out a Digest server that provided the algorith last in the
header line without quotes and with a CRLF immediately following...

- David McCreedy provided libcurl changes for doing HTTP communication on
non-ASCII platforms. It does add some complexity, most notably with more
#ifdefs, but I want to see this supporte

- David McCreedy provided libcurl changes for doing HTTP communication on
non-ASCII platforms. It does add some complexity, most notably with more
#ifdefs, but I want to see this supported added and I can't see how we can
add it without the extra stuff added.

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- David McCreedy made changes to allow base64 encoding/decoding to work on
non-ASCII platforms.

Avoid typecasting a signed char to an int when using is*() functions, as that
could very well cause a negate number get passed in and thus cause reading
outside of the array usually used for

Avoid typecasting a signed char to an int when using is*() functions, as that
could very well cause a negate number get passed in and thus cause reading
outside of the array usually used for this purpose.

We avoid this by using the uppercase macro versions introduced just now that
does some extra crazy typecasts to avoid byte codes > 127 to cause negative
int values.

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Olaf St�ben fixed a bug that caused Digest authentication with md5-sess to
fail. When using the md5-sess, the result was not Md5 encoded and Base64
transformed.

Dan Fandrich added the --disable-crypto-auth option to configure to allow
libcurl to build without Digest support. (I figure it should also explicitly
disable Negotiate and NTLM.)

removed tabs and trailing whitespace from source

Joel Chen reported that we assumed content within quotes a bit too much in
the digest code. This fixes it.

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

Vincent Bronner made the code use the correct user name + password when
doing proxy authentication.

return CURLDIGEST_NOMEM when a memory function fails to deliver

Check that memory functions return non-NULL or return error.

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

Luca fixed the nc= in the digest line since it apparantly should not have
quotes...

use %ld to printf now.tv_sec