FIX: compilation on Linux 2.4: Issue 250

https://github.com/embedthis/appweb-4/issues/250
FIX: Locking primitives fail on Windows single core systems

https://github.com/embedthis/appweb-4/issues/248
Update doc for 4.4.4
FIX: Chunk filter fails to parse boundary

Issue: https://github.com/embedthis/appweb-4/issues/247
FIX: Windows directory traversal

Issue: https://github.com/embedthis/appweb-4/issues/246
FIX: Global variable not initialized on warm restart

The MPR “shared” cache global must be zeroed on a warm boot.

Issue: https://github.com/embedthis/appweb-4/issues/249