CLC-2128 Create user whitelist table and make it administrable
CLC-2128 Pseudo-code sketch of can-login check
CLC-2127 Implement user whitelist in front-end and session controller
CLC-2127 Add TODO
Merge pull request #1270 from yuhunglin/CLC-2111

[CLC-2111] Spare extra object allocation
Merge pull request #1271 from ctweney/clc-2128

CLC-2127 User whitelist implementation
CLC-2055 Based on load tests, stale db conns need more frequent flushes
Merge pull request #1272 from ctweney/clc-2055-flushtweak

CLC-2055 Based on load tests, stale db conns need more frequent flushes
CLC-2171 Deal properly with links that are in more than 1 subsection of the same section
Merge pull request #1274 from ctweney/clc-2171

CLC-2171 Deal properly with links that are in more than 1 subsection of ...
[CLC-1676] Asset sharding fixes for torquebox