(jka-compr-compression-info-list): Use gzip to extract .Z files, since
it is more common than uncompress.
;; can-append strip-extension-flag file-magic-bytes]
'(["\\.Z\\(~\\|\\.~[0-9]+~\\)?\\'"
"compressing" "compress" ("-c")
- "uncompressing" "uncompress" ("-c")
+ "uncompressing" "gzip" ("-c" "-q" "-d")
nil t "\037\235"]
;; Formerly, these had an additional arg "-c", but that fails with
;; "Version 0.1pl2, 29-Aug-97." (RedHat 5.1 GNU/Linux) and