clib2 Code

- Removed the timeval/TimeVal change workaround and replaced it with something
cleaner.

- Added a wrapper function which handles the thread-safe stdio stream
resolution.

- In tcflush() a break signal can no longer cause the read flush loop
to be quit with two semaphores still locked.

- In __obtain_daemon_message() the test to verify if the bsdsocket.library API
would support the server API functionality checked the wrong feature. Fixed.

- Switched over the fd->fd_DefaultFile references to fd->fd_Socket where
sockets are used rather than file handles.

- Replaced rows of blank spaces by tabs.

- Added a comment to clarify which version number is being used for the
'_fd' data structure definition.

- Added functions which modify the callback function and the userdata pointer
stored in a low level unbuffered file/socket data structure. These function
perform the proper locking and are thus safe to use in a thread-safe environment.

- The low level unbuffered file/socket now has a public equivalent, which
is defined (along with the typedefs and flags) in <sys/clib2_io.h>. Functions
for tinkering with it are still to come.

- The math kernel code no longer uses its own private scalbn() function.

- Added a function prototype for the _exit() function. Note that _exit() is
not an ISO 'C' function.

- Corrected the getopt() function prototype, as prompted by Henning Nielsen Lund.

- Added a directory to hold contributed code which has not been integrated
with the library yet.

- The byteswap code was contributed by Peter Bengtsson. Thank you very much!

- The printf() family no longer adds a 0 or 0x prefix if the alternate
conversion modifier is present for the %o and %x conversions and the
value to be converted is 0 already. Put another way, printf("%#x %#o",0,0);
now prints "0 0". This required another change so that %p always includes
the 0x prefix even if the pointer involved is a NULL pointer.