further simplifying the logic that is contained in
ft/ft_node-serialize.cc

This reverts commit 92557e6b.

toku_dbt_is_infinite(). Also, check for the builtin key comparison
function to get an inlined version to run when possible.

FT-281 Add support for big-endian keys that can be compared using the builtin key comparison function

keys must come from a DBT stored in the ftnode by adding
ftnode_pivot_keys::fill_dbt()

of gcc

safer and more readable.

function

possible, untangling the dependency between parameters 'ft->compare_fun' and
'ft->cmp_descriptor' in a sensible way. It is now much less necessary to
create a fake db (good) and some long parameter lists are now shorter
(it's a start)

each transaction's ranges instead of a hand-rolled buffer.

db->getf_set now perform zero mallocs. Also, move the is_temporary
bit into the cursor constructor.

functor instead of a macro for iterate.