Hello everyone,

since Guenter started to clean up the general mingw32-make makefiles,
I would like to provide patches to clean up the winbuild nmake
makefiles while still providing backwards compatibility.

Attached you will find a set of 3 patches:

[PATCH 1/3] winbuild: Clean up formatting and variable naming

- Changed space usage to line up with the whole file
- Renamed CFLAGS_SSPI/IPV6 to SSPI/IPV6_CFLAGS to be
  consistent with the other CFLAGS_x variables
- Make use of existing CFLAGS_IPV6 (previously IPV6_CFLAGS)
  instead of appending directly to CFLAGS

[PATCH 2/3] winbuild: Aligned USE_SSPI with other USE_x defines

Renamed external parameter USE_SSPI = yes/no to ENABLE_SSPI = yes/no.
Backwards compatible change: USE_SSPI can still be passed as external
parameter with yes/no value as long as ENABLE_SSPI is not given.

USE_x defines are passed around with true/false values internally,
USE_SSPI is now aligned to this approach, but still accepts external
values yes/no being passed, just like the other defines.

[PATCH 3/3] winbuild: Make USE_WINSSL depend on USE_SSPI

Since WinSSL cannot be build without SSPI being enabled,
USE_WINSSL now defaults to the value of USE_SSPI.

The makefile does now raise an error if WinSSL is enabled
while SSPI is disabled.

--
I tried to explain everything in the patch files and now I would like
to get your feedback on this changes.
The only backwards incompatible change would be that WinSSL now
required SSPI to be enabled, but that shouldn't be a problem since
that is the default. I basically just tied the default of WinSSL to
the SSPI setting and error out if SSPI is not enabled while building
with WinSSL.
If you think the patches are already ready to be pushed, please do so.
Thanks in advance!
Best regards,
Marc

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