[tex-k] secure mode of dvips should be default

[Sebastian Rahtz]

I have updated the texk sources in TeXLive so that dvips can be made
secure against shell escapes by using the "z0" directive in config.ps
(which is now the default in TeXLive). It can be overridden on the
command-line with -R1. Confusing letters, but the history of dvips
does not allow much else to be done.

TeXLive also now includes janl's xdvik with t1lib included, hurrah!
seems to work nicely.

for those who want to compare sources, see
http://www.tug.org/texlive/tlprod/Build/source/

Sebastian