[tex-live] locally disabling maps/formats/patterns

[Karl Berry]

Dan and all,

Norbert implemented a way for the -local config files to remove entries
from the main file, by using lines like:
  #!pdflatex
  #!lm.map
  %!german

The documentation that I wrote in the --help message should appear at
  http://tug.org/texlive/doc/tlmgr.html#generate__option_____what
tomorrow, along with the code in tlnet as usual.

Suggestions/improvements welcome as usual.  It's an undoubtedly
complicated area.

k