The Keyring PDB handler is a helper class for the Palm::PDB package. It
parses Keyring for Palm OS databases. 

http://gnukeyring.sourceforge.net/

It has the standard Palm::PDB methods with 4 additional public methods.
Unlock, Lock, Decrypt and Encrypt.

It currently supports the v4 Keyring databases as well as the
pre-release v5 databases.
