Windows project configurations that use OpenSSL with USE_WIN32_CRYPTO
need crypt32.

Follow-up to 148534d which added CURLSSLOPT_NATIVE_CA for 7.71.0.

The changes that are in this commit were made by script.

Ref: https://gist.github.com/jay/a1861b50ecce2b32931237180f856e28

Closes https://github.com/curl/curl/pull/5516

Closes #854

After squashing most of our compiler warnings, up'ed the default
warning level from 3 to 4 in order to increase the likelyhood of
catching future warnings.

find . -name .gitignore -print0 | xargs -i -0 sort -o '{}' '{}'

This wasn't possible with the old curlsrc project filenames, but like
commit 2a615a2b64 and 11397eb6dd for libcurl use the built in Visual
Studio macros for the output filenames.

Following commit 957fcd9049 and in preparation for adding the VC14
project files renamed the curl source project files.

Defined the DEBUGBUILD pre-processor variable to allow extra logging,
which is particularly useful in debug builds, as we use this and Visual
Studio typically uses _DEBUG.

We could define DEBUBBUILD, in curl_setup.h, when _MSC_VER and _DEBUG is
defined but that would also affect the makefile based builds which we
probably don't want to do.

As this pre-processor definition is defined in curl_setup.h there is no
need to include it in the Visual Studio project files.

Added support for WinIDN build configurations to the VC7 and VC7.1
project files.

A left over from the VC6 project files, so mainly cosmetic in Visual
Studio .NET as it can handle both comma and semi-colon characters for
separating multiple pre-processor definitions.

However, the IDE uses semi-colons if the value is edited, and as such,
this may cause problems in future for anyone updating the files or
merging patches.

Used the Visual Studio IDE to correct the separator character.