build: set default x86_64 flags to target k8 rather than core2, to avoid SSE/MMX in the kernel.
vfs: handle /path/to//file by dropping the emtpy path segment (ie, becomes /path/to/file)
posix: don't free physical pages tied to shared memory maps in PosixSubsystem destructor
utilities: copy reversed state in RangeList copy constructor
process: clear Semaphore pending queue when a Semaphore is destroyed
posix: redirect /bin to /applications. To access a 'bin' directory on a disk, use '/./bin'.