* Strip empty strings from database revocation stmts
It's technically valid to give empty strings as statements to run on
most databases. However, in the case of revocation statements, it's not
only generally inadvisable but can lead to lack of revocations when you
expect them. This strips empty strings from the array of revocation
statements.
It also makes two other changes:
* Return statements on read as empty but valid arrays rather than nulls,
so that typing information is inferred (this is more in line with the
rest of Vault these days)
* Changes field data for TypeStringSlice and TypeCommaStringSlice such
that a client-supplied value of `""` doesn't turn into `[]string{""}`
but rather `[]string{}`.
The latter and the explicit revocation statement changes are related,
and defense in depth.
The backwards compatibility logic was preventing updates to role
statements from taking effect. This change removes persistence of
deprecated statement fields.
* Database updates
* Add create/update distinction for connection config
* Add create/update distinction for role config
* Add db name and revocation statements to leases to give revocation a
shot at working if the role has been deleted
Fixes#3544Fixes#4782
* Add create/update info to docs
* redoing connection handling
* a little more cleanup
* empty implementation of rotation
* updating rotate signature
* signature update
* updating interfaces again :(
* changing back to interface
* adding templated url support and rotation for postgres
* adding correct username
* return updates
* updating statements to be a list
* adding error sanitizing middleware
* fixing log sanitizier
* adding postgres rotate test
* removing conf from rotate
* adding rotate command
* adding mysql rotate
* finishing up the endpoint in the db backend for rotate
* no more structs, just store raw config
* fixing tests
* adding db instance lock
* adding support for statement list in cassandra
* wip redoing interface to support BC
* adding falllback for Initialize implementation
* adding backwards compat for statements
* fix tests
* fix more tests
* fixing up tests, switching to new fields in statements
* fixing more tests
* adding mssql and mysql
* wrapping all the things in middleware, implementing templating for mongodb
* wrapping all db servers with error santizer
* fixing test
* store the name with the db instance
* adding rotate to cassandra
* adding compatibility translation to both server and plugin
* reordering a few things
* store the name with the db instance
* reordering
* adding a few more tests
* switch secret values from slice to map
* addressing some feedback
* reinstate execute plugin after resetting connection
* set database connection to closed
* switching secret values func to map[string]interface for potential future uses
* addressing feedback
* Start work on passing context to backends
* More work on passing context
* Unindent logical system
* Unindent token store
* Unindent passthrough
* Unindent cubbyhole
* Fix tests
* use requestContext in rollback and expiration managers
