Ap |char* |delimcpy |char* to|char* toend|char* from \
|char* fromend|int delim|I32* retlen
p |void |deprecate |char* s
+p |void |deprecate_old |char* s
Afp |OP* |die |const char* pat|...
p |OP* |vdie |const char* pat|va_list* args
p |OP* |die_where |char* message|STRLEN msglen