#66 Many config params not recognised in the command-line

[James Devenish]

The documentation for PDFDoclet states:

"All other configuration values can be specified as an argument or in a
property file."

This is *not* the case. For instance, ARG_FILTER, ARG_LB_TAGS_PREFIX,
etc, are not used in PDFDoclet.java.

When using PDFDoclet with Ant, it is helpful to be able to pass
configuration parameters using the syntax of:
<doclet>
<param .../>
</doclet>

This requires that configuration be possible via the command-line as
claimed in the PDFDoclet documentation.