Add optional database connection parameters to the DatabaseLink. This

replaces the old, automatic setting of LongReadLen and LongTruncOk in
SQL.pm, and is much more flexible.
Fix some documentation with allowMacroAccess in the DatabaseLink.
Additional tests for DatabaseLink.
Document the new parameter behavior in the changelog and gotchas file.

lib/WebGUI/i18n/English/WebGUI.pm

@@ -3315,10 +3315,28 @@ a user.|,
 		lastUpdated => 1165511447,
 	},
 
-	'allow access from macros' => {
-                message => q|Allow access from Macro's|,
-                lastUpdated => 0,
-        },
+    'allow access from macros' => {
+        message => q|Allow access from Macro's|,
+        lastUpdated => 0,
+    },
+
+    'allow access from macros help' => {
+        message => q|Are macros allowed to access this DatabaseLink?|,
+        lastUpdated => 1185397688,
+    },
+
+    'additional parameters' => {
+        message => q|Additional database parameters|,
+        lastUpdated => 1185397688,
+    },
+
+    'additional parameters help' => {
+        message => q|<p>Specify additional parameters for your database connection.  Use 1 per line, and separate the name of the parameter from the value with an equal sign, like this: </p>
+<p>LongReadLen=1024<br />
+LongTruncOk=1</p>
+|,
+        lastUpdated => 1185397688,
+    },
 
 	'preview' => {
 		message => q|Preview|,