Fix example so it is clear the secure defaults should always be used.
Add update to ExampleSSLConfig.md
Merge pull request #3393 from wsargent/fix_insecure_ws_example

[doc] Fix example so it is clear the secure defaults should always be used.
Fixed documetation by removing colon from Content-Security-Policy Default Setting
Fix db.queryExecuteTimeLimit doc
Update Collections.scala

Small documentation fixes for `unfoldLeft` method.
Fix typo in documentation