Changes in version 2.23.90 are:
* Use 'Create' button instead of 'OK' when prompting the user for 
  a password to create a new keyring. [Adam Schreiber]
* Fix more cases where 'Deny' choice by a user resulted in 
  more subsequent prompts.
* Automatically create non-existant directories when storing files.
* Fix problem prompting for the same password twice when parsing a 
  PFX or PKCS#12 file.
* Don't offer to store password during import operation.
* Don't try to store certificates encrypted on the disk.
* Add command line tool for importing of keys and certificates.
* Fix problems with SSH agent not unlocking keys properly.
* Build fixes. [John Ralls]