Ap |NV |str_to_version |SV *sv
Ap |SV* |swash_init |char* pkg|char* name|SV* listsv \
|I32 minbits|I32 none
-Ap |UV |swash_fetch |SV *sv|U8 *ptr
+Ap |UV |swash_fetch |SV *sv|U8 *ptr|bool do_utf8
Ap |void |taint_env
Ap |void |taint_proper |const char* f|const char* s
Ap |UV |to_utf8_lower |U8 *p