Fix auth handling during OfferCreate (RIPD-414)
Make bind_handler variadic ctor explicit
Add HTTPHeaders::build_map
Enable asynchronous handling of HTTP-RPC (RIPD-390)
* Activate async code path
* Tidy up HTTP server code
* Use shared_ptr in HTTP server
* Remove check for unspecified IP
* Remove hairtrigger
* Fix missing HTTP authorization check
* Fix multisocket flags in RPC-HTTP server
* Fix authorization failure when no credentials required
* Addresses RIPD-159, RIPD-161, RIPD-390
Set version to 0.26.1
Fix unhandled exception in async HTTP server (RIPD-475)
Add owner_funds to subscription streams (RIPD-377)
Merge branch 'release-next' into release

Conflicts:
	src/ripple/module/app/paths/cursor/ForwardLiquidity.cpp
	src/ripple/overlay/tests/peer_info.test.cpp
	src/ripple/unity/http.h
Set version to 0.26.2
Add ledger.history.mismatch insight statistic
Make sure we update mTNByID when we replace the root
Improve parallelization of getRippleLines
Merge remote-tracking branch 'upstream/release' into tmp
Fix a unit test warning
Set version to 0.26.3-rc2
Squashed 'src/rocksdb2/' content from commit 37c6740

git-subtree-dir: src/rocksdb2
git-subtree-split: 37c6740c383bb9a6ee2747b04f08bc77fcfa10c5
Merge commit '1d38671f5edc2322bc58417816674cc629ae7a70' as 'src/rocksdb2'
Update includes and scons
Remove old rocksdb/
Add enable_if_lvalue