some compile fixes, api changes, and i added the ability to create new chunks on...

some compile fixes, api changes, and i added the ability to create new chunks on the stack, which can extend the main...

Original commit message from CVS:
some compile fixes, api changes, and i added the ability to create new chunks on the
stack, which can extend the main thread's stack up to 8M under linuxthreads. thanks
to billh for the {set,get}rlimit tip.

on the other hand, there's a nasty bug in cothreads when they are run without gthreads
that i'm still tracking down. that's the last bug though, at this point.

the commit is to syn the repository with my working copy before moving cothreads to a
separate module.