Unable to find an editor, vipw would give this error:
# env EDITOR=fnord vipw
vipw: pw_edit(): No such file or directory
vigr or crontab do better:
# env EDITOR=fnord crontab -e
crontab: no crontab for root - using an empty one
crontab: fnord: No such file or directory
crontab: "fnord" exited with status 1
After this change, vipw behaves more like vigr or crontab:
# env EDITOR=fnord vipw
vipw: fnord: No such file or directory
vipw: "fnord" exited with status 1
Reviewed by: rpokala, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25369
b3e6b1d11f