[libpq] update to 12.0

[Neumann-A]

Original #8487. Testing how far this will get on windows

[vicroms]

I must say I'm impressed by the sheer number of perl patches needed for this PR, kudos!

It'll take me some time to review it thoroughly but with just a cursory look everything seems to be OK.

[JackBoosY]

/azp run

[Neumann-A]

@JackBoosY @vicroms Can somebody rerun CI for this one. The update is required so that vcpkg can move to OpenSSL 1.1

nevermind just read hat CI is down ;)

[JackBoosY]

/azp run

[JackBoosY]

If there are no modifications to vcpkg_build_make.cmake/vcpkg_common_functions.cmake /ports.cmake , please revert them.

[Neumann-A]

@JackBoosY Reverting will be a bit difficult since your "make PR" was merged in here and fixed before it was in master. will try to copy files over from master and remove the diff that way but will wait until the qt PR (#9260) is merged

[Neumann-A]

If there are no modifications to vcpkg_build_make.cmake/vcpkg_common_functions.cmake /ports.cmake , please revert them.

@JackBoosY: Done

[cenit]

also, another note: patches are full of "non-changes" with only the # This must be updated comment appended. Is it some work left to do or is it possible to clean up those patches?

[Neumann-A]

also, another note: patches are full of "non-changes" with only the # This must be updated comment appended. Is it some work left to do or is it possible to clean up those patches?

Some of those changes in the _release.patch are just to keep symmetry with the _debug.patch. Path to GSS libs probably must be changed but the required port is not yet in VCPKG(?). Some of the OpenSSL patches could be removed though but redoing the diff without the original buildtree requires extra time.