rem: if ( strcmp(str,freq_map[i].str) == 0){
add: if ( strcasecmp(str,freq_map[i].str) == 0){
context: icalrecurrencetype_frequency icalrecur_string_to_freq(const char* str){    int i;    for (i=0; freq_map[i].kind != ICAL_NO_RECURRENCE ; i++) {	if ( strcmp(str,freq_map[i].str) == 0){	    return freq_map[i].kind;	}    }    return ICAL_NO_RECURRENCE;}