Add QSQLITE_OPEN_URI database connection flag

This flag enables the URI mode for database names in the SQLite
backend. Without this flag, it's not possible to use URIs like
    'file:somedb?mode=memory&cache=shared'
to create shared, in-memory databases.

Change-Id: I2938184dad1f27c7af454385ca305bd4f6ed1a5e
Reviewed-by: Mark Brand <mabrand@mabrand.nl>

dist/changes-5.2.0

@@ -148,6 +148,7 @@ Changes in Qt 5.1.0 (missing from released changelog dist/changes-5.1.0)
 Changes in Qt 5.2.0
 - [QTBUG-29261] IBASE: Construct a valid QTime when creating timestamps for iBase SQL driver.
 - [QTBUG-33389] PSQL: Format QDateTime following ISO8601.
+- Add QSQLITE_OPEN_URI option to QSQLITE driver
 
 ****************************************************************************
 *                      Platform Specific Changes                           *

src/sql/drivers/sqlite/qsql_sqlite.cpp

@@ -596,6 +596,8 @@ bool QSQLiteDriver::open(const QString & db, const QString &, const QString &, c
         }
         if (option == QLatin1String("QSQLITE_OPEN_READONLY"))
             openMode = SQLITE_OPEN_READONLY;
+        if (option == QLatin1String("QSQLITE_OPEN_URI"))
+            openMode |= SQLITE_OPEN_URI;
         if (option == QLatin1String("QSQLITE_ENABLE_SHARED_CACHE"))
             sharedCache = true;
     }

src/sql/kernel/qsqldatabase.cpp

@@ -1264,6 +1264,7 @@ QSqlRecord QSqlDatabase::record(const QString& tablename) const
     \list
     \li QSQLITE_BUSY_TIMEOUT
     \li QSQLITE_OPEN_READONLY
+    \li QSQLITE_OPEN_URI
     \li QSQLITE_ENABLE_SHARED_CACHE
     \endlist