be defined as many include files as possible (Solaris req)

specify exactly what global parts to init. Thanks to Sterling Hughes really
for arguing wisely.

   If your system, such as Solaris 2.7, lacks the strtok_r() prototype in
   string.h, then you'll face a bunch of warnings on all instances
   where strtok_r() is used.

   There's not much we can do about it. Adding a prototype here screws
   everything up on other platforms! :-(

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