* libmisc/Makefile.am, libmisc/shell/cmd_help.c, libmisc/shell/cmds.c,
libmisc/shell/internal.h, libmisc/shell/shell.c,
libmisc/shell/shell.h, libmisc/shell/shellconfig.h: Command set
processing now separated from main command loop. Addition of user
commands and aliases tested. Monitor registration now explicit.
* libmisc/shell/shell_cmdset.c, libmisc/shell/shell_makeargs.c,
libmisc/shell/write_file.c: New files.
