[tex-live] teTeX-3.0 merge

[Thomas Esser]

> What changes are needed?  Can you make them, please?  It's ok to check
> into Master at this point.  Still working on subversion setup.

Well, texmf.cnf needs to know about TEXMFVAR, TEXMFCONFIG, TEXMFSYSCONFIG
etc. ...  And since you allowed me to edit that file, I have taken the
oportunity to somehow merge the files to make it easier to maintain.

All path settings from teTeX have been taken over. One exception if the
VARTEXFONTS variable which is $TEXMFVAR/fonts in TeX Live which helps
the windows part, I guess. If someone wants a "compatibility fallback",
please set it. Memory settings have not been changed. All paths and
memory settings present only in TeX Live are now at the end of the file
which should make it easier to follow changes in teTeX / web2c and to
spot things which might be obsolete.

Thomas