Resolvconf is a framework for keeping track of the system's
information about currently available nameservers. It sets itself up
as the intermediary between programs that supply nameserver
information and programs that use nameserver information. Examples of
programs that supply nameserver information are: ifupdown, DHCP
clients, the PPP daemon and local nameservers. Examples of programs
that use this information are: DNS caches, resolver libraries and the
programs that use them.