ambrevar/shell: Rename checksum to sha1.

.local/share/common-lisp/source/ambrevar/shell.lisp

@@ -291,8 +291,8 @@ Return process name as second value."
      process-pid
      process-name)))
 
-(export-always 'checksum)
-(defun checksum (file)                  ; TODO: Use pure CL version.
+(export-always 'sha1)
+(defun sha1 (file)                  ; TODO: Use pure CL / FFI version?
   "Return checksum of FILE."
   (first (first (tokenize (cmd:$cmd "sha1sum" file)))))