gdb

gdb
	* symfile.c (reread_symbols): Update.
	* objfiles.h (struct objfile) <cp_namespace_symtab>: Remove
	field.
	* objfiles.c (allocate_objfile): Update.
	* cp-support.h (cp_check_possible_namespace_symbols): Don't
	declare.
	* cp-namespace.c (lookup_symbol_file): Don't call
	lookup_possible_namespace_symbol.
	(initialize_namespace_symtab, get_possible_namespace_block)
	(free_namespace_block, cp_check_possible_namespace_symbols)
	(check_possible_namespace_symbols_loop)
	(check_one_possible_namespace_symbol)
	(lookup_possible_namespace_symbol): Remove.
	(maintenance_cplus_namespace): Replace with notice.
	(_initialize_cp_namespace): Deprecate `maint cplus namespace'.
gdb/testsuite
	* gdb.cp/maint.exp (test_help): Update.
	(test_namespace): Likewise.