fix Issue 12098 - libcurl bad argument on handle null
Merge pull request #1920 from 9rnsr/fix12098

[REG2.065a] Issue 12098 - libcurl bad argument on handle null
Convert to new alias syntax
Merge pull request #1926 from 9rnsr/new_alias_syntax

Convert to new alias syntax
std.stdio: Add File.windowsHandle, fdopen and windowsHandleOpen

This moves existing code from std.process to std.stdio for public use.