/*
=for apidoc Am|SV*|newSVpvn_utf8|NULLOK const char* s|STRLEN len|U32 utf8
-Creates a new SV and copies a string into it. If utf8 is true, calls
+Creates a new SV and copies a string (which may contain C<NUL> (C<\0>)
+characters) into it. If utf8 is true, calls
C<SvUTF8_on> on the new SV. Implemented as a wrapper around C<newSVpvn_flags>.
=cut