Explain our latest conventions in sample.config

This shows and documents our current practices for defining the API
server(s) and using scheme-relative URLs.
Change /bin/sh to /bin/bash in push.sh
Disable ssl (in apache) if certs aren't found
Move shared apache config out of sites-* folders
Remove unwanted MSIE exceptions in apache config
Remove OPENTREE_API_HOST and related explanation.

This was not needed and confuses the documentation here, as pointed out
in
https://github.com/OpenTreeOfLife/opentree/commit/0688020bd4e5f03d97ad029ce8d2d8ce664dcaf7#commitcomment-7658480
Split HTTP vs. HTTPS vhost configuration.

See related discussion in #412.
Add the SSL vhost file (d'oh!)
Merge pull request #412 from OpenTreeOfLife/deployment-fixes

Deployment fixes for Cavia (production)