Add mbstring identify filter for 'binary' encoding

Author: alexdowad

ext/mbstring/libmbfl/mbfl/mbfilter_8bit.c

@@ -50,6 +50,12 @@ const mbfl_encoding mbfl_encoding_8bit = {
 	&vtbl_wchar_8bit
 };
 
+const struct mbfl_identify_vtbl vtbl_identify_8bit = {
+	mbfl_no_encoding_8bit,
+	mbfl_filt_ident_common_ctor,
+	mbfl_filt_ident_true
+};
+
 const struct mbfl_convert_vtbl vtbl_8bit_wchar = {
 	mbfl_no_encoding_8bit,
 	mbfl_no_encoding_wchar,

ext/mbstring/libmbfl/mbfl/mbfilter_8bit.h

@@ -35,5 +35,6 @@
 #include "mbfilter.h"
 
 MBFLAPI extern const mbfl_encoding mbfl_encoding_8bit;
+extern const struct mbfl_identify_vtbl vtbl_identify_8bit;
 
 #endif /* MBFL_MBFILTER_8BIT_H */

ext/mbstring/libmbfl/mbfl/mbfl_ident.c

@@ -163,6 +163,7 @@ static const struct mbfl_identify_vtbl *mbfl_identify_filter_list[] = {
 	&vtbl_identify_utf16,
 	&vtbl_identify_utf16le,
 	&vtbl_identify_utf16be,
+	&vtbl_identify_8bit,
 	&vtbl_identify_false,
 	NULL
 };