Documentation for try and unwind_protect

[John W. Eaton]

On 31-Oct-2006, Bill Denney wrote:

| Here is a bit of documentation for try and unwind_protect.  I may have 
| sent this before, but I didn't see it in a quick search and it's not 
| committed.
| 
| Bill
| 
| src/ChangeLog:
| 
| 2006-10-31  Bill Denney  <address@hidden>
|     * help.cc: add documentation for try and unwind_protect

I checked in this change.

Thanks,

jwe