pkg info stalls on nfs mounts

[Sean Bruno]

I'm unsure why, but pkg info seems to fail on nfsroot nowadays (1.9.x vs
1.8.x).  Other commands seem to work "just fine".

root at sysdev06:~ # pkg install iperf3 netperf
Updating FreeBSD repository catalogue...
FreeBSD repository is up-to-date.
All repositories are up-to-date.
The following 3 package(s) will be affected (of 0 checked):

New packages to be INSTALLED:
        iperf3: 3.1.3
        netperf: 2.7.0
        indexinfo: 0.2.5

Number of packages to be installed: 3

The process will require 1 MiB more space.
264 KiB to be downloaded.

Proceed with this action? [y/N]: y
Fetching iperf3-3.1.3.txz: 100%   90 KiB  92.0kB/s    00:01
Fetching netperf-2.7.0.txz: 100%  169 KiB 172.8kB/s    00:01
Fetching indexinfo-0.2.5.txz: 100%    5 KiB   5.2kB/s    00:01
Checking integrity... done (0 conflicting)
[1/3] Installing indexinfo-0.2.5...
[1/3] Extracting indexinfo-0.2.5: 100%
[2/3] Installing iperf3-3.1.3...
[2/3] Extracting iperf3-3.1.3: 100%
[3/3] Installing netperf-2.7.0...
[3/3] Extracting netperf-2.7.0: 100%
root at sysdev06:~ # pkg info
pkg: sqlite error while executing iterator in file
pkgdb_iterator.c:1033: database is locked

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