Version number detection, command detection, terminal setup and a few
other bits have moved.
The processed (not .in) scripts will look for it in e.g. /usr/local/lib/firehol
or wherever the system will install it. The .in scripts will look for it in
their own directory.
Updated the configure system so that it correctly replaces paths rather
via the Makefile rather than trying to subsitute NONE in configire.ac.
Extracted all of the configure-time command substitutions to a single
sed file which is used to process the script.in files. Extended the
package checks to cover this file.
