perl 5.003_01: perl.h

perl 5.003_01: perl.h

Update NeXT support
Make HIDEMYMALLOC the default
Add home-grown calloc() to MYMALLOC #defines
Drop long long support under UTS
Add new distinct GV type
Add Plan9 support
Use variable BIN_SH to find shell
Allow redirection of output usually sent to stderr, so it can be
  handled separately from normal output
Don't log memory allocations until we've got an interpreter set up
Don't doubly define DEBUGGING_MSTATS
Add globals and macros for improved signal handling, duplicate "my",
  strict untie, and debugger updates
Rename some globals to avoid collisions with system headers