Handle whitespace separating an 'ip port' correctly (RIPD-552)
The tree cache has to be much larger

This doesn't significantly increase memory consumption because
most entries are pinned anyway.
Make more RocksDB tunables
Add support for universal compaction
SHAMap performance improvements [RIPD-434]
 * Remove mTNByID
 * Remove mDirtyNodes
 * Much faster traverses
 * Faster snapshots
 * New algorithm for flushing
 * New vistNodes/visitLeaves
 * Avoid I/O if a map is unbacked
[FOLD] Fixes:
* Fix build error on clang
* Fix issue Nik caught
* Take suggestions from code review