clib2 Code

This commit was manufactured by cvs2svn to create tag 'V1_203'.

*** empty log message ***

- Final checkin prior to upcoming release.

- Added 68k stubs to amiga_rexxvars.c for the OS4 build to use. The new code now
works just about exactly like the amiga.lib RVI code used to do, which means
that there is no artificial length limit for the number of characters a string
retrieved may have, and the code is largely reentrant.

- The 68k stub for StrcpyN stored d1 as a result value, which was both
dangerous and unnecessary.

- Plugged in 68k stubs for the OS4 build.

- To work around a bug in the Roadshow TCP/IP stack (since fixed), the waitselect()
function now substitutes a 10 microsecond timeout for a zero length timeout.

- isatty() now checks if the file descriptor refers to a real file before
it calls IsInteractive() on it.

- Added disk type definitions to mount_convertinfo.c and unistd_common_pathconf.c,
prompted by Thore Boeckelmann.

- Preparations for OS4 conversion.

- MakeString() did not clear the ns->ns_Ivalue field and did not NUL-terminate
the copied string either. Fixed.