--dhcp-optsfile=<path>
Read DHCP option information from the specified file. If a directory
is given, then read all the files contained in that directory in alphabetical order. The advantage of
using this option is the same as for --dhcp-hostsfile: the
--dhcp-optsfile will be re-read when dnsmasq receives SIGHUP. Note that
it is possible to encode the information in a
--dhcp-boot
flag as DHCP options, using the options names bootfile-name,
server-ip-address and tftp-server. This allows these to be included
in a --dhcp-optsfile.