arpwatch changes:
- Convert arp2ethers from csh to sh
- updated ethercode.dat
- misc minor bugfixes
Changes from Geert Hendrickx:
- move ethercodes.dat to share/arpwatch (from etc)
- Use ${VARBASE:Q} instead of ${VARBASE} as suggested by pkglint
- Use OWN_DIRS to note the admin about the stale db directory after
deinstallation
Changes from William Fletcher:
- add a rc.d script
- add a '-m' option to specify the recipient for email messages (still
defaults to root)
Fix pkg/32151 by Geert Hendrickx
4d67338c9e