* command.c (lookup_cmd_1): Clarify descriptive comments.

	* command.c (lookup_cmd_1):  Clarify descriptive comments.
	* gdbcmd.h (maintenanceprintlist):  Add declaration.
	* main.c (maintenanceprintlist):  Add definition.
	* main.c (gdb_completer_command_word_break_characters):  Add.
	* main.c (symbol_completion_function):  Switch completer word
	break character sets dynamically, based on whether completion is
	being done on commands or on something else.
	* main.c (initialize_cmd_lists):  Init maintenanceprintlist.
	* maint.c:  Include demangle.h.
	* maint.c (maintenance_demangle):  New function.
	* maint.c (maintenance_print_command):  New function.
	* maint.c (_initialize_maint_cmds):  Reorganize some commands
	under new maintenance print subcommand.