Changed magic bytes to match the updated spec. Filename

suffix wasn't changed yet.

src/liblzma/common/auto_decoder.c

@@ -52,10 +52,10 @@ auto_decode(lzma_coder *coder, lzma_allocator *allocator,
 		coder->sequence = SEQ_CODE;
 
 		// Detect the file format. For now this is simple, since if
-		// it doesn't start with 0xFF (the first magic byte of the
+		// it doesn't start with 0xFD (the first magic byte of the
 		// new format), it has to be LZMA_Alone, or something that
 		// we don't support at all.
-		if (in[*in_pos] == 0xFF) {
+		if (in[*in_pos] == 0xFD) {
 			return_if_error(lzma_stream_decoder_init(
 					&coder->next, allocator,
 					coder->memlimit, coder->flags));

src/liblzma/common/stream_flags_common.c

@@ -20,7 +20,7 @@
 #include "stream_flags_common.h"
 
 
-const uint8_t lzma_header_magic[6] = { 0xFF, 0x4C, 0x5A, 0x4D, 0x41, 0x00 };
+const uint8_t lzma_header_magic[6] = { 0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00 };
 const uint8_t lzma_footer_magic[2] = { 0x59, 0x5A };