This commit restores the previous logic of accepting an 8-byte intptr as evidence
enough for 64bit. It also accepts presence of IsWow64Process as evidence of 64bit.
On 64bit, this may return true or false depending on the process. On 32bit this entry
point is not available and an exception will be raised.
* Unified operating system type detection
* Revert "Unified operating system type detection"
This reverts commit 3edf0edfceaca259e041e23b9930d78531366fd5.
* Introduced OperatingSystem.IsLinux instead of constant check on Os version.
* Misc
Nicholas Seckar