Explain that post-* hook STDERR is marshalled back to the client.
Patch from Mark E. Hamilton (mhamilt@...), with some slight tweaks.
This fixes issue #110.
* src/en/book/ch09-reference.xml: Tell the truth about post-* hook STDERR output.
Authored by: fitz 2008-05-04
Parent: [r3053]
Child: [r3055]
