Upgrading a 15.0-RELEASE base package install to 16-CURRENT

I know, 15.0-RELEASE has been out now for over a month, and I'm easily bored. Obviously, it's time to switch back to running 16-CURRENT with whatever random patches I am working on atm.

This is the general procedure:

• create an old environment
• create a new boot environment
• mount it
• finagle package signatures

sideloading with pkgbase

• stash a list of packages
• sync base packages
• sync ports packages

# pkg prime-origins | sort | uniq > /etc/packages.lst
# pkg fetch -yr FreeBSD-base -do /var/tmp/base -g FreeBSD-\*
# pkg fetch -yr FreeBSD -do /var/tmp/pkg $(grep -v \# /etc/packages.lst)

updating 15.0-CURRENT from ~ 3 weeks ago to 15.0-ALPHA1

NB I built my own pkgbase set, based off stable/15 @ 0b3d82579a01db4c5d874cda1ac468bb8f26c109

The overall plan is:

1. upgrade only the GENERIC kernel package from my pkgbase set
2. reboot
3. upgrade all the remaining base system packages from my pkgbase set
4. update the EFI boot loader from the just-installed FreeBSD-bootloader

this seems to work ok, but fails on reboot:

• switch to /bin/sh first
• pkg-static upgrade -r FreeBSD (now they're upgraded)
• pkg-static upgrade -r pkg-base
• check tools listed above
• check password file specifically

Starting syslogd.