[phenixbb] Request: read definitions from stdin

[Joe Krahn]

I want to be able to run PHENIX in a shell script, where stdin is 
accepted as a definition input file. It could be simply specified as the 
usual POSIX syntax where "-" defines stdin in place of an input file. If 
the front-end is based too heavily on file suffix mappings, you could 
add a flag "--stdin=SUFFIX" to define reading stdin as if it had the 
given SUFFIX.

It would also be nice to avoid the duplication of output to both stdout 
and the .log file. Output can always be sent to /dev/null, but it would 
be nicer to have either a --quiet flag to suppress stdout, or a DEF 
option to disable the .log output, or both options to let the user decide.

Most other computational programs can be run this way, so I assume that 
other people would find this useful, especially for running PHENIX from 
scripts. Hopefully, it is also a fairly easy feature to implement.

Thanks,
Joe Krahn