Fix local variable unfundedOffers that was shadowing a class variable.
Pathfinding fixes:
 * Don't consider global freeze if not enforcing
 * Log if a covering path fails to cover
Set version to 0.26.2-alpha-2
Fix error with multi-quality paths.
Set version to 0.26.2-alpha-3
Logic fix for multiquality issues.
Set version to 0.26.2-alpha-4
Remove rocksdb in preparation for subtree add
Squashed 'src/rocksdb/' content from commit 224932d

git-subtree-dir: src/rocksdb
git-subtree-split: 224932d4d0b561712107d747c662df181c39644d
Merge commit 'f86d9fd626df1cee55bce4c577d06bb064dc827b' as 'src/rocksdb'
Update rocksdb unity file (RIPD-352)
Fix macro setting for rocksdb unity file
Detect node store batch write failures (RIPD-270):
* Raise open file limit from the soft max to the hard max.
Remove obsolete nickname support
Cleanups and performance optimizations (RIPD-450):
* Remove AccountItems and AccountItem
* Restructure RippleLineCache to not require shared_ptr
* Avoid expensive copies of base_uint<160> in RippleState
Update Doxyfile (RIPD-175):
* Clean up the include path to reflect updated code structure.
* Update PROJECT_BRIEF to more accurate title.
* Fix location of logo graphic.
* Hide all undocumented classes.
Refactor beast::SemanticVersion (RIPD-199)
Bump ledger_wait timeout for Travis
Add the git tag to the compile (RIPD-238)
Fix Pathfinder::getPathsOut to use Issue