Fix single chunk flag handling during decompression.

Update docs.

README.md

@@ -89,6 +89,9 @@ NOTE: The option "libbsc" uses  Ilya Grebnov's block sorting compression library
        '-M' -     Display memory allocator statistics
        '-C' -     Display compression statistics
 
+NOTE: It is recommended not to use '-L' with libbsc compression since libbsc uses
+      LZP internally as well.
+
 Environment Variables
 =====================
 

main.c

@@ -527,6 +527,10 @@ start_decompress(const char *filename, const char *to_filename)
 		enable_rabin_scan = 1;
 	}
 
+	if (flags & FLAG_SINGLE_CHUNK) {
+		props.is_single_chunk = 1;
+	}
+
 	nprocs = sysconf(_SC_NPROCESSORS_ONLN);
 	if (nthreads > 0 && nthreads < nprocs)
 		nprocs = nthreads;