Upgraded my ERL to 6.4 release from 6.4-beta (snapshot was downloaded and installed 9/27/18) and only ran into a minor snag regarding unbound. I recently enabled DNS-over-TLS and DNSSEC on my unbound machines and while the upgrade to 6.4 release went without a problem on my apu2, the lack of a hardware clock on the ERL rendered unbound non-responsive due to DNSSEC requiring accurate time to verify the root key signature. This was an oversight on my part, as I didn't enable a secondary DNS server for the ERL to talk to beyond itself. So, if you are using DNSSEC, remember to have a secondary DNS server, or perhaps put IP addresses instead of server names for NTP, in order to not be bit by this.
This machine acts as primary DNS server for management network, and secondary DNS server for home network. dmesg to follow. Thanks to the OpenBSD team! Copyright (c) 1982, 1986, 1989, 1991, 1993 The Regents of the University of California. All rights reserved. Copyright (c) 1995-2018 OpenBSD. All rights reserved. https://www.OpenBSD.org OpenBSD 6.4 (GENERIC.MP) #0: Sat Oct 13 03:52:37 UTC 2018 visa@octeon:/usr/src/sys/arch/octeon/compile/GENERIC.MP real mem = 536870912 (512MB) avail mem = 523796480 (499MB) mainbus0 at root: board 20002 rev 2.18 cpu0 at mainbus0: CN50xx CPU rev 0.1 500 MHz, Software FP emulation cpu0: cache L1-I 32KB 4 way D 16KB 64 way, L2 128KB 8 way cpu1 at mainbus0: CN50xx CPU rev 0.1 500 MHz, Software FP emulation cpu1: cache L1-I 32KB 4 way D 16KB 64 way, L2 128KB 8 way clock0 at mainbus0: int 5 octcrypto0 at mainbus0 iobus0 at mainbus0 simplebus0 at iobus0: "soc" octciu0 at simplebus0 cn30xxsmi0 at simplebus0 com0 at simplebus0: ns16550a, 64 byte fifo com0: console dwctwo0 at iobus0 base 0x1180068000000 irq 56 usb0 at dwctwo0: USB revision 2.0 uhub0 at usb0 configuration 1 interface 0 "Octeon DWC2 root hub" rev 2.00/1.00 addr 1 octrng0 at iobus0 base 0x1400000000000 irq 0 cn30xxgmx0 at iobus0 base 0x1180008000000 cnmac0 at cn30xxgmx0: RGMII, address 44:d9:e7:40:b5:c8 atphy0 at cnmac0 phy 7: AR8035 10/100/1000 PHY, rev. 2 cnmac1 at cn30xxgmx0: RGMII, address 44:d9:e7:40:b5:c9 atphy1 at cnmac1 phy 6: AR8035 10/100/1000 PHY, rev. 2 cnmac2 at cn30xxgmx0: RGMII, address 44:d9:e7:40:b5:ca atphy2 at cnmac2 phy 5: AR8035 10/100/1000 PHY, rev. 2 /dev/ksyms: Symbol table not valid. umass0 at uhub0 port 1 configuration 1 interface 0 "Lexar USB Flash Drive" rev 2.10/11.00 addr 2 umass0: using SCSI over Bulk-Only scsibus0 at umass0: 2 targets, initiator 0 sd0 at scsibus0 targ 1 lun 0: <Lexar, USB Flash Drive, 1100> SCSI4 0/direct removable serial.05dca83aZB0L2W63LA4P sd0: 30526MB, 512 bytes/sector, 62517248 sectors vscsi0 at root scsibus1 at vscsi0: 256 targets softraid0 at root scsibus2 at softraid0: 256 targets boot device: sd0 root on sd0a (fb74a192b03ee90f.a) swap on sd0b dump on sd0b WARNING: No TOD clock, believing file system. WARNING: CHECK AND RESET THE DATE!