clib2 Code

- Added test cases for C99 format conversions.

- For the printf() "%a" conversion the exponent now comes out as a binary
number rather than a decimal one. Now how odd is that?

- strtod() and strtof() now support "inf"/"infinity"/"nan"/"nan(..)" and
hexadecimal floating point numbers, for C99.

- Added the fpclassify(), isfinite(), isnormal() and signbit() macros for C99.

- Reimplemented isnan() and isinf() as macros for C99. The corresponding
functions will be dropped from the library. Note that the isinf() macro
does not return -1, 0 or 1 like the old function did, but only 0 or 1
depending upon whether the parameter represents +/- infinity or not.

- Added fabsf() for C99.

- Added HUGE_VALF to <math.h>.

- The printf() family now supports the %hh, %j, %t and %z modifiers and the
%a/%A conversions for C99. The %j is treated like %ll, %t and %z are treated
like %l.

- Plugged in the proper ISO 8601 week number calculation function.

- strftime() now ignores the E and O modifiers.

- Added strtof(), llabs(), lldiv(), vsscanf() and vscanf() for C99.

- strftime() now supports %C, %n, %r, %R, %t, %T, %u, %V, and %z for C99.

- The libunix.a flavour of system() no longer attempts to translate the name
of a command unless it contains path separator characters.

- Fixed a typo in the semaphore creation code. Ouch.

- If fread()/fwrite() fail to read/write any data because either the number
of records or the size of each record is zero, both now call clearerr() to
avoid giving the caller the wrong impression that an EOF or error occured.