** Bug fixes
+ gzip -d -S SUFFIX file.SUFFIX would fail for any upper-case byte in SUFFIX.
+ E.g., before, this command would fail:
+ $ :|gzip > kT && gzip -d -S T kT
+ gzip: kT: unknown suffix -- ignored
+ [bug present since the beginning]
+
When decompressing data in 'pack' format, gzip no longer mishandles
leading zeros in the end-of-block code. [bug introduced in gzip-1.6]