v4.2.5

Fixed the issues related to the Sync with Kerio Server when using EAS 16 protocol
Fixed the issues related to Certificate-Based Authentication (CBA)
Added a feature showing an occurrence icon of a recurring event
Added a feature showing the number of Contacts at the bottom of the Contacts
Added a feature saving an HTML attachment to an account signature
Changed the default S/MIME algorithm - Signing: SHA-2, Encryption: AES-256
Fixed other bugs and improved performance

File hashes:
MD5: 9696923b08d9c6e61cc1ecc44926d5fb
SHA-1: ab5c70fc2fa71ca27e34cf879a0a114f7da611a1
SHA-256: e1a52d2475ec63b3c2a118b3d38951d1ff54c6a041bbabf9fe891507be2f1d8f
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