Modify the command-line shell to print a warning when using an in-memory
database.
In the command-line shell, on the banner, warn about the use of a
transient in-memory database in bold red text.
On unix, make the "transient in-memory database" text bold, but not red.
Leave the text read on windows.
Add the ".save" command as an alias for ".backup".  Improvements to the
way font changes are implemented on the in-memory database warning.
Make sure that virtual WHERE-clause terms do not get transformed into real
terms when processing set of OR-connected terms.
Fix for ticket [4c86b126f22ad].
Fixes to the "editline" support in the command-line shell.
Updates to the command-line shell.  Simplify the banner message.  Add the
".save" command as an alias for ".backup".  When starting with no arguments,
include a banner message warning that the database is transient and in-memory
and mention the ".open" command.
Increase the version number to 3.8.4
Merge latest trunk changes.
Various fixes and test case updates so that veryquick.test passes again.