Disallow unquoted database names with dot

Author: l-heemann

modules/ROOT/pages/database-administration/standard-databases/naming-databases.adoc

@@ -19,9 +19,9 @@ Naming rules for databases are as follows:
 The `-` (dash) and `.` (dot) characters are not legal in Cypher variables.
 Names with a `-` in them must be enclosed within backticks.
 For example, `CREATE DATABASE ++`main-db`++` is a valid database name.
-Database names are the only identifier for which dots do not need to be escaped.
-For example `main.db` is a valid database name.
-However, this behavior is deprecated due to the difficulty of determining if a dot is part of the database name or a delimiter for a database alias in a composite database.
+Since Neo4j 5.27 names with a `.` in them must be enclosed within backticks.
+However, database names with dots in them are not recommended, due to the difficulty of determining if a dot is part of the database name or a delimiter for a database alias in a composite database.
+A future version of Neo4j may disallow database names with dots entirely.
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 It is possible to create an alias to refer to an existing database to avoid these restrictions.