Log Message:
Update pgpdump to 0.23.

0.23 2004/10/27

* Catching up to 2440bis-10/11.
	- 'u' for Literal Data
	- embedded signature
	- Primary Key Binding Signature
* Bug fix for plain_Secret_Key().
* Fixing Symmetrically_Encrypted_Data_Packet() and Secret_Key_Packet()
  especially for IDEA.