: croak()'s first parm can be NULL. Otherwise, mod_perl breaks.
Afprd |void |croak |NULLOK const char* pat|...
Aprd |void |vcroak |NULLOK const char* pat|NULLOK va_list* args
+Aprd |void |croak_no_modify
Aprd |void |croak_xs_usage |NN const CV *const cv \
|NN const char *const params