clib2 Code

- Reworked the code that handles quoting for the wildcard expansion
routine. We no longer allocate memory and then modify it, but
call a function for each quoted parameter which does whatever is
necessary.

- The shell command parameter parser now considers the non-breaking
space character (ISO code 160) to be a blank space character, too.

- The lstat() code now reliably detects that it found a soft link.

- Fixed the compilation problems I had introduced by mistake.

- Added atoll(), ffs(), ftw(), nftw(), lstat() and uname() code
contributed by Peter Bengtsson. Thank you very much!

- Cleaned up the header files some more; the POSIX stdio thread locking functions
are now defined as empty macros unless __THREAD_SAFE is defined.

- Updated the README file to mention the PowerPC platform, the floating point
support and the thread-safety.

- The translation of Unix to Amiga path names now silently accepts
absolute Amiga path names passed to it and will use them without
changing them.

- Extended the thread-safety locking to the file descriptors.

- The thread-safety code is now subject to conditional compilation.
Both the library and the user code need to be rebuilt with the
preprocessor symbol __THREAD_SAFE defined to get thread-safe
code.

- Added more semaphore locking around the basic stdio, memory, locale
and dirent data operations. That should do it! While the library is
not reentrant (this is not ixemul.library) it should be thread-safe
now. Thread-safe in the sense of POSIX 1003.1c-1995.