Issue 12: Document requirements on various sorts of names

Reported by Unknown User, Dec 11, 2004

(This entry was imported from the savannah tracker, original 
location: https://savannah.nongnu.org/bugs/index.php?11295)

Cert names and values cannot contain "_", but 
"-" is valid.  File attributes, on the other hand, can 
contain "_", but trigger an assertion error in basic_io.cc 
if they contain "-".  Need to find oddnesses of this type 
and write them down.  Or reduce the need to write them down by 
rationalizing naming requirements.

monotone