This is an incomplete list of changes in the WRPRC 2.xx files relative
to the WRPRC 1.xx files).

INCLUDEPATH is no more.  Use INCLUDEROOT.

MANPATH is no more.  Use MANROOT.

Imake.tmpl has been split into Imake.tmpl, Imake.cf, and Imake.params.
The latter also includes what used to be Project.tmpl.

Imake.params defines some commonly used directories: BINDIR, ETCDIR, USRLIBDIR,
ADMDIR, TMPDIR

Imake.params contains symbols for libraries commonly used to build WRPRC
project.  For each library there is a XXXLIB symbol for linking and a DEPXXXLIB
symbol for dependencies.

UseSoelim (defined or not defined) has now become HasSoelim (YES/NO).

EXTRA_INCLUDES is replaced by PROJECT_INCLUDES.  PROJECT_DEFINES is a
new symbol for project-specific -D's.

No programs are built.  This distribution now only contains configuration
files.  Thus there is no use for UseInstalled in any of the symbol definitions
or rules, and all of the *Dependency() rules have been removed.

The program building rules are completely different.  BuildProgram() is
the main interface to this.

Use BuildLibrary(), not NormalLibraryTarget().

The installation rules are completely different, especially those for manpages.

Document rules are different.
