[thrift] TSocketPool::addServer, c++ version

[thrift] TSocketPool::addServer, c++ version

Summary: Same thing as the previous PHP change. Also includes a new constructor for easy building of a TSocketPool with a single host (for later filling in via addServer) without extra std::vector boxing/unboxing.

Reviewed By: mcslee

Test Plan: Synapse c++ client at r62896 uses this.

Revert: OK

TracCamp Project: Thrift

DiffCamp Revision: 909

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665297 13f79535-47bb-0310-9956-ffa450edef68