testing/piler: new aport

testing/piler/0001-utf8_encode_char.patch

+diff -ruN a/src/decoder.h b/src/decoder.h
+--- a/src/decoder.h	2021-02-23 07:26:47.000000000 +0100
++++ b/src/decoder.h	2022-03-28 18:35:10.706474194 +0200
+@@ -11,5 +11,6 @@
+ void decodeHTML(char *p, int utf8);
+ void decodeURL(char *p);
+ int utf8_encode(char *inbuf, int inbuflen, char *outbuf, int outbuflen, char *encoding);
++void utf8_encode_char(unsigned char c, unsigned char *buf, int buflen, int *len);
+ 
+ #endif /* _DECODER_H */