Pkg(8) bug workaround:
The pkg rquery man page is incorrect. It lists the invocation of
pkg rquery as "-U -r reponame" but if it's invoked in that order, it
will squawk errors if any of the repositories are misconfigured. The
command must be "pkg rquery -r reponame -U" in order to limit pkg(8) to
a single repository.
The order sensitivity came into play with "synth upgrade-system" command
on a brand new system. The 00_synth.conf pkg(8) configuration file was
created but there were no repository files created yet, cause pkg(8) to
emit errors on Synth repo when checking the official FreeBSD package
repo. This resulted in no packages prefetching even though "synth status"
indicated some would be fetched. Rearranging the internal rquery
commands works around the misleading pkg(8) documentation (or bug?).
FreeBSD-specific system root validity check.
The $SYSROOT/boot directory doesn't have to be present, but if it is,
there must also be present $SYSROOT/boot/modules directory. Synth now
checks for this on FreeBSD and stops with an informative message when
the modules directory needs to be created by the root user.
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