[PATCH 2/3] gitweb: add output buffering and associated functions

This adds output buffering for gitweb, mainly in preparation for
caching support.  This is a dramatic change to how caching was being
done, mainly in passing around the variable manually and such.

This centrally flips the entire STDOUT to a variable, which after the
completion of the run, flips it back and does a print on the resulting
data.

This should save on the previous 10K line patch (or so) that adds more
explicit output passing.
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 gitweb/gitweb.perl |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)