clib2 Code

- Updated the copyright information.

- fwrite() now flushes the entire "buffer" for unbuffered files. The
exception are "interactive" files such as console windows. For these
line buffered output is used.

- Whether or not a file is bound to an interactive device, such as a
console window, is now checked and remembered after a file descriptor
has been associated with it.

- The data structure alignment (file I/O buffer) is now configurable
at compile time. The default used to be 16 bytes, which is appropriate
for the 68040/68060 but not for the PowerPC, which uses 32 or 128
bytes per cache line.

- Changed the definition of alloca() for GCC, which now defaults
to the built-in function.

- Updated the stdio.h, stdlib.h, string.h and unistd.h header files
to declare function prototypes for the __MEM_DEBUG versions of the
library functions only if that preprocessor symbol is defined.

- If a SIGINT signal is caught and processed by the default signal
handler, the localized "*** BREAK" string will be printed rather
than the built-in one.

- Tried to make it possible to have debug versions of the memory
management code in the default link library along with the
normal versions. Let's see how well this works out in the GCC
version. SAS/C does not seem to like it...

- Moved the memory initialization and cleanup functions into the
malloc/free code itself and updated the alloca code to do its
own data management.

- Finally optimized the alloca() memory cleanup code.

- The common error reporting function __show_error() could throw Enforcer
hits if the program was not launched from Shell. Fixed.

- Moved the environment variable cleanup code into a destructor function.

- Fixed a typo in the hstrerror() function.

- The Kickstart 1.x specific code for error requesters is no longer built
for the OS4 library.

Added simple startup code for baserel