Use XC_CHECK_BUILD_FLAGS instead XC_CHECK_USER_FLAGS.

This reverts commit 6b27703b.

The internal function that's used to detect known file extensions for
the default Content-Type got the the wrong pointer passed in when
CURLFORM_BUFFER + CURLFORM_BUFFERPTR were used. This had the effect that
strlen() would be used which could lead to an out-of-bounds read (and
thus segfault). In most cases it would only lead to it not finding or
using the correct default content-type.

It also showed that test 554 and test 587 were testing for the
previous/wrong behavior and now they're updated as well.

Bug: http://curl.haxx.se/bug/view.cgi?id=1262
Reported-by: Konstantin Isakov

Christian Heimes brought to our attention that the certdata.txt
format has recently changed [1], causing ca-bundle.crt created
with mk-ca-bundle.[pl|vbs] to include untrusted certs.

[1] http://lists.debian.org/debian-release/2012/11/msg00411.html

Instead of claiming it is an error, we call it a "note" to reduce the
severity level. But the following text now says the [variable] "*should*
only be used to specify"... instead of previously having said "may".

Not needed

Since the merge of SessionHandle with Curl_one_easy, this indirection
isn't used anymore.

Since Curl_one_easy is really a SessionHandle now, this indirection
doesn't exist anymore.

It isn't needed anymore

The motivation for having a separate struct that keep track of an easy
handle when using the multi handle was removed when we switched to
always using the multi interface internally. Now they were just two
separate struct that was always allocated for each easy handle.

This first step just moves the Curl_one_easy struct members into the
SessionHandle struct and hides this somehow (== keeps the source code
changes to a minimum) by defining Curl_one_easy to SessionHandle

The biggest changes in this commit are:

 1 - the linked list of easy handles had to be changed somewhat due
     to the new struct layout. This made the main linked list pointer
     get renamed to 'easyp' and there's also a new pointer to the last
     node, called easylp. It is no longer circular but ends with ->next
     pointing to NULL. New nodes are still added last.

 2 - easy->state is now called easy->mstate to avoid name collision

This reverts commit 82ab5f1b as this was the wrong place to
document the complexity of IMAP URLs and Custom Requests.

In addition to listing the folder contents, in the URL examples, added
an example to list the new messages waiting in the user's inbox.

Update the packages/vms/readme file to be current.

Also some files for the GNV based build were either missing or needed an
update.

curl_crtl_init.c is a special file that is run before main() to
set up the proper C runtime behavior.

generate_vax_transfer.com generates the VAX transfer vector modules from
the gnv_libcurl_symbols.opt file.

gnv_conftest.c_first is a helper file needed for configure scripts to
come up with the expected answers on VMS.

gnv_libcurl_symbols.opt is the public symbols for the libcurl shared
image.

gnv_link_curl.com builds the shared libcurl image and rebuilds other
programs to use it.

macro32_exactcase.patch is a hack to make a local copy of the VMS Macro32
assembler case sensitive, which is needed to build the VAX transfer modules.

report_openssl_version.c is a tool for help verify that the libcurl
shared image is being built for a minium version of openssl.

Display progress-bar unconditionally on first call

Use tvnow() and tvdiff() to avoid introducing new linkage issues

Also, use memset() instead of a lame loop.

The previous logic that tried to avoid too many updates were very
ineffective for really fast transfers, as then it could easily end up
doing hundreds of updates per second that would make a significant
impact in transfer performance!

Bug: http://curl.haxx.se/mail/archive-2013-07/0031.html
Reported-by: Marc Doughty

(This doesn't need to appear in the release notes.) I noticed a few places
where infof() was called, and there should've been an LF at the end of the
string, but there wasn't.

It turns out Snow Leopard not only has SecItemCopyMatching() defined in
a header not included by the omnibus header, but it won't work for our
purposes, because searching for SecIdentityRef objects wasn't added
to that API until Lion. So we now use the old SecKeychainSearch API
instead if the user is building under, or running under, Snow Leopard.

Bug: http://sourceforge.net/p/curl/bugs/1255/
Reported by: Edward Rudd

Previously we used __MAC_10_X and __IPHONE_X to mark digest-generating
code that was specific to OS X and iOS. Now we use
__MAC_OS_X_VERSION_MAX_ALLOWED and __IPHONE_OS_VERSION_MAX_ALLOWED
instead of those macros.

Bug: http://sourceforge.net/p/curl/bugs/1255/
Reported by: Edward Rudd

When the multi-socket API is used, we need the handle to be checked
again when it gets unpaused.

Bug: http://curl.haxx.se/mail/lib-2013-07/0239.html
Reported-by: Justin Karneges

For the standard VMS text file formats, VMS needs to read the file to
get the actual file size.

For the standard VMS binary file formats, VMS needs a special format of
fopen() call so that it stops reading at the logical end of file instead
of at the end of the blocks allocated to the file.

I structured the patch this way as I was not sure about changing the
structures or parameters to the routines, but would prefer to only call
the stat() function once and pass the information to where the fopen()
call is made.

Bug: https://sourceforge.net/p/curl/bugs/758/

The code for CURLFORM_FILECONTENT had its check for duplicate options
wrong so that it would reject CURLFORM_PTRNAME if used in combination
with it (but not CURLFORM_COPYNAME)! The flags field used for this
purpose cannot be interpreted that broadly.

Bug: http://curl.haxx.se/mail/lib-2013-07/0258.html
Reported-by: Byrial Jensen

Linking on Solaris 10 x86 with Sun Studio 12 failed when we upgraded
automake for the release builds.

Bug: http://curl.haxx.se/bug/view.cgi?id=1217
Reported-by: Dagobert Michelsen