send a bitset have all, if a local file is added

and minor fixes

solanaceae/ngc_ft1_sha1/backends/sha1_mapped_filesystem.cpp

@@ -89,7 +89,7 @@ void SHA1MappedFilesystem::newFromFile(std::string_view file_name, std::string_v
 		sha1_info.file_size = file_impl->_file_size; // TODO: remove the reliance on implementation details
 		sha1_info.chunk_size = chunkSizeFromFileSize(sha1_info.file_size);
 		{
-			// TOOD: remove
+			// TODO: remove
 			const uint32_t cs_low {32*1024};
 			const uint32_t cs_high {4*1024*1024};