* Adding FAQ entry for elastic search
Creating a new category of FAQs for application specific configuration
and adding the first entry for Elasticsearch
Addresses https://github.com/istio/istio/issues/14743
* Making changes to address comments
- Clarifying the text
- Removing unnecessary info
- Adding info on using MTLS
- Adding StatefulSet to .spelling
* Updating the MTLS limit for Release 1.3
* Addressing reviews
Removing spelling entry
Removing Alias for faq file
* Shortened as requested by reviewer
banix