bug#16359: "guild list" lists nothing

[Zefram]

"guild list" is meant to list the available subcommands within guild.
It actually shows an empty list:

$ GUILE=/usr/bin/guile-2.0 guild list
Usage: guild COMMAND [ARGS]
Run command-line scripts provided by GNU Guile and related programs.

Commands:

For help on a specific command, try "guild help COMMAND".

Report guild bugs to address@hidden
GNU Guile home page: <http://www.gnu.org/software/guile/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info guile 'Using Guile Tools'
$

Subcommands mentioned in the guile documentation are actually available,
despite not being listed.

This is guile-2.0.9 on Debian.  Debian incarnation of this bug report:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=734313

-zefram