bld.conf consists of lines used to set various configuration
options for bld. The lines are processed in order of appearance.
Options set via bld.conf are overriden by bld command line
options. If two lines assign different values to the same variables, the
last is used. Blank lines and lines beginning with a `#' are ignored.
bld.conf lines have the following format:
variable = value
variable can be on of the following:
daemon: (0 or 1) fork to background or not.
address: IP address to bind to.
port: port to listen to.
min_interval: minimum time interval before blacklisting.
max_submissions: maximum submissions in time interval.