This is the package signature as generated by The GnuPG. This signature identifies the party that created the package. By verifying it you are sure that the package coming from a trustworty person or organization.
Here is the package signature:
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) iD8DBQBG5wHfqesEzEdeXBERAtf/AJ0dS+dgKx+ystrXPUIQbYO8S+sp1gCeJGq4 c+0O68TSwV8w9pmcw8RQysw= =5IwQ -----END PGP SIGNATURE-----
You can save this signature in a text file (e.g. avahi-0.6.20-i486-1gds.tgz.asc) in the same directory where the package file (avahi-0.6.20-i486-1gds.tgz) resides and you can verify it by issuing the following command:
gpg --verify avahi-0.6.20-i486-1gds.tgz.asc
NOTE: You need to import the public key of SlackPack first:
gpg --import KEY