Upon upgrading from netcfg-11.6-4.3.noarch to netcfg-11.6-5.1.noarch the
following files were moved from /etc to /usr/etc:

/etc/ethers
/etc/networks
/etc/protocols
/etc/services

 Because of this, these files are virtually nonexistent to some program:

netadmin:/etc # ls -la /etc/services
ls: cannot access '/etc/services': No such file or directory

 This makes - for example - telnet command unable to connect to switches, etc.
managed by me, but I'm afraid there are other negative consequences.