[dev] New PGP functionality

[Andreas Dahlén]

The problem occurs when you have more then one adressbook and the 
mailaddress isn't in the last addressbook.

If you try to encrypt, view any of the keys in the public keyring 
you get en error; "No public key found for nnn".

The problem is the function turbaGetPublicKey in turba/lib/api.php.

If the emailaddress is found in the first addressbook the variable 
$result is set.  If the mailadress can't be found in the next 
addressbook "No public key found for nnn" is returned.

What should happen if the mailaddress is found in two different 
addressbooks? Shouldn't "More than 1 entry found" be returned?  

/Andreas