profile_add_node
errcode_t profile_add_node
retval = profile_add_node(state->root_section, cp, NULL, 0,
retval = profile_add_node(state->current_section, tag, NULL, 0,
profile_add_node(state->current_section, tag, value, 1, &node);
retval = profile_add_node(section, *cpp, NULL, 0, §ion);
retval = profile_add_node(section, *cpp, new_value, 0, NULL);