Add support for 'smartcards' to TLS identity.

Increasingly chipcards and similar secure/hardware based PKI storage containers are used for the x509 identity certificates of medical staff.

Osirix would miss those' by default' as the keychain scan only looks in the current default (which is often the soft-token list). 

This minor changes makes it look a bit broader. Tested against the dutch UZI pass (http://www.uziregister.nl/english/, http://www.answersforbusiness.nl/regulation/medical-records, http://www.worldofhealthit.org/sessionhandouts/documents/PS14-2-Sprenger.pdf)

Thanks,

Dw.