Maintenance PR

[elicn]

[Replaces #1173]

Maintenance PR for security and code quality.

Highlights:

• Safer path semantics
  • Provide the emulated program with virtual paths rather than host paths, when possible (WIP)
  • Paths accessed by the emulated program must end up under rootfs to prevent messing up the host file system [that takes symlinks into considerations to prevent path traversals]
• The emulated program must reside somewhere in rootfs
• Revised POSIX filestruct and socket modules for a better code quality
• Improved format srtring handling
• Comments and typing annotations

Bug fixes (Windows):

• Fixed wrong KI USER SHARED DATA location
• Fixed missing fcall unwinding on DllMain exeution (system DLLs get to run longer now)
• Fixed clipboard data handling
• Fixed Windows threads scheduling bug
• Fixed several Windows APIs
• Implemented several missing Windows APIs

[xwings]

always in love with your code.