clib2 Code

- Added asctime_r(), ctime_r(), gmtime_r(), localtime_r() and strtok_r().

- Added stubs for the Rexx Variables Interface code that used to
be part of amiga.lib. While comparable functionality is available
in rexxsyslib.library V45, the new stubs might be helpful during
porting. Care must be taken since these functions don't work
exactly like the originals.

- Integrated strlcpy() and strlcat() which are intended to be safer
replacements for strncpy() and strncat().

- The program's task priority is now configurable through an external
variable '__priority'.

- The process name to be used when detaching can be configured through
the new '__process_name' variable.

- The minimum required operating system version can be configured
through the new '__minimum_os_lib_version' variable; a matching
error message can be provided through the new '__minimum_os_lib_error'
variable.

- The default console window specification can be overriden through
the new '__stdio_window_specification' variable.

- The socket initialization code did not set up a reference to the
'h_errno' variable correctly. This had the effect of making name
and address resolution errors trash the 'errno' variable instead
and leaving 'h_errno' always set to 0. Fixed.

- For sockets, ioctl() and fcntl() now interact on the FIONBIO/FIOASYNC
requests (ioctl) and the O_NOBLOCK/O_ASYNC flags (fcntl).

- popen() now accepts "rb" and "wb" as mode parameters. However, "r+",
"w+" and variants thereof are still unsupported due to the
unidirectional pipe support in the standard "PIPE:" device.