Reduce the number of I/O redirections.
Reduce the number of I/O redirections.

- scripts/schhist2web: instead of having many >>"$index", just put one at
  the enclosing construct

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan