Although ifconfig resides in /sbin, /sbin is not in the standard user path.
However, many users need to run ifconfig, such as checking the IP address,
or whether a dial-up link has really come up.
I think it would be beneficial to supply a symbolic link to /usr/bin for this
purpose. It seems that some other programs might require similar arrangements.
Rationale for this proposal: Users do not need to know the location of
programs that they can run, they must be able to run all the "user" programs
that they can. A "user" program in this context refers to programs which
are intended to be run by people, In this sense, ifconfig seems to be a "user"
program as well as a program that can be run automatically.