doc.tex: updated to new index.tex rules

1. No numbering \def\secid{*}
2. Ignore \pdfoutlines if level is 9 or more
index.tex: added /F 4 (print) to pdf links

Trailing spaces were removed.
pdfa: to generate PDF/A-1b files
sphyphen.tex: \catcode`\^^c2=13

Active instead of ignored.
\let^^c2=\empty
But now it is possible to recover the octet.
pdfa.tex: several enhancements

1. \newifxmpf to chack if there is a xmpdata file
2. \utf renamed \@utf to avoid clash with spplain.tex
3. using counters \count@ and \count@@
4. \catcode playing
5. trailing spaces removed