Update to 0.73:

[Changes for 0.73 - Wed Jun  5 23:44:57 CST 2013]

* Properly redo the previous fix using File::Spec->file_name_is_absolute.

[Changes for 0.72 - Wed Jun  5 23:19:02 CST 2013]

* Only allow loading Digest::* from absolute paths in @INC,
  by ensuring they begin with \ or / characters.

  Contributed by: Florian Weimer (CVE-2013-2145)

[Changes for 0.71 - Tue Jun  4 18:24:10 CST 2013]

* Constrain the user-specified digest name to /^\w+\d+$/.

* Avoid loading Digest::* from relative paths in @INC.

  Contributed by: Florian Weimer (CVE-2013-2145)

[Changes for 0.70 - Thu Nov 29 01:45:54 CST 2012]

* Don't check gpg version if gpg does not exist.

  This avoids unnecessary warnings during installation
  when gpg executable is not installed.

  Contributed by: Kenichi Ishigaki

[Changes for 0.69 - Fri Nov  2 23:04:19 CST 2012]

* Support for gpg under these alternate names:

    gpg gpg2 gnupg gnupg2

  Contributed by: Michael Schwern

(wiz)