[jggimi]

Per the announcement:

• time_t is now 64 bits on all platforms.
• Releases and packages are now cryptographically signed with the signify(1) utility.
• Installer improvements.
• New/extended platforms.
• Improved hardware support.
• Generic network stack improvements.
• Routing daemons and other userland network improvements.
• pf(4) improvements.
• dhcpd(8) and dhclient(8) improvements.
• iked(8) improvements.
• OpenSMTPD 5.4.2.
• Security improvements.
• Performance improvements.
• Threading improvements.
• OpenSSH 6.6.

Full details here.