[tex-live] [pdftex] PDF 1.5 by default in TL 2010

[Karl Berry]

To correct myself -- I had said we were thinking of \pdfcompresslevel=2,
but this was wrong, I should have said \pdfobjcompresslevel.  As Heiko
stated, the choice is about

a) the current setting
   \pdfminorversion=4
   \pdfcompresslevel=9
   \pdfobjcompresslevel=0

b) the suggested new setting
   \pdfminorversion=5
   \pdfcompresslevel=9
   \pdfobjcompresslevel=2 (recommended setting from manual)


Another thing we could do is provide separate executables/formats
pdflatex-14, etc.  Then both options would always be available to all
users.