FAQ update for external clients (#2381)

* First update to faq for external clients for configuring server affinity, external listen address for cross domain txn, and preference for load balancer tunneling

* Incorporate first documentation review changes

* doc updates

* doc updates

* edits and corrected lowercase to be one word

* Remove JTA Notes as RJVM forwarding will resolve external WebLogic JTA access

Co-authored-by: Tom Barnes <[email protected]>
Co-authored-by: Rosemary Marano <[email protected]>

Author: 3 people