Rename x-lzma to x-tor-lzma

We shouldn't call it lzma, because we are imposing a limit on the
memory needed for decoding.

src/common/compress.c

@@ -313,7 +313,9 @@ static const struct {
 } compression_method_names[] = {
   { "gzip", GZIP_METHOD },
   { "deflate", ZLIB_METHOD },
-  { "x-lzma", LZMA_METHOD },
+  // We call this "x-tor-lzma" rather than "x-lzma", because we impose a
+  // lower maximum memory usage on the decoding side.
+  { "x-tor-lzma", LZMA_METHOD },
   { "x-zstd" , ZSTD_METHOD },
   { "identity", NO_METHOD },
 

src/test/test_buffers.c

@@ -854,7 +854,7 @@ struct testcase_t buffer_tests[] = {
   { "compress/zstd", test_buffers_compress, TT_FORK,
     &passthrough_setup, (char*)"x-zstd" },
   { "compress/lzma", test_buffers_compress, TT_FORK,
-    &passthrough_setup, (char*)"x-lzma" },
+    &passthrough_setup, (char*)"x-tor-lzma" },
 
   END_OF_TESTCASES
 };

src/test/test_dir_handle_get.c

@@ -2530,13 +2530,14 @@ test_dir_handle_get_parse_accept_encoding(void *arg)
   encodings = parse_accept_encoding_header("gzip");
   tt_uint_op(B_NONE|B_GZIP, OP_EQ, encodings);
 
-  encodings = parse_accept_encoding_header("x-zstd, deflate, x-lzma");
+  encodings = parse_accept_encoding_header("x-zstd, deflate, x-tor-lzma");
   tt_uint_op(B_NONE|B_ZLIB|B_ZSTD|B_LZMA, OP_EQ, encodings);
 
-  encodings = parse_accept_encoding_header("x-zstd, deflate, x-lzma, gzip");
+  encodings = parse_accept_encoding_header(
+                                        "x-zstd, deflate, x-tor-lzma, gzip");
   tt_uint_op(B_NONE|B_ZLIB|B_ZSTD|B_LZMA|B_GZIP, OP_EQ, encodings);
 
-  encodings = parse_accept_encoding_header("x-zstd,deflate,x-lzma,gzip");
+  encodings = parse_accept_encoding_header("x-zstd,deflate,x-tor-lzma,gzip");
   tt_uint_op(B_NONE|B_ZLIB|B_ZSTD|B_LZMA|B_GZIP, OP_EQ, encodings);
 
  done:

src/test/test_util.c

@@ -5753,7 +5753,7 @@ struct testcase_t util_tests[] = {
   UTIL_LEGACY(pow2),
   COMPRESS(zlib, "deflate"),
   COMPRESS(gzip, "gzip"),
-  COMPRESS(lzma, "x-lzma"),
+  COMPRESS(lzma, "x-tor-lzma"),
   COMPRESS(zstd, "x-zstd"),
   UTIL_TEST(gzip_compression_bomb, TT_FORK),
   UTIL_LEGACY(datadir),