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/Operation/DatabaseLink.pm

@@ -193,12 +193,20 @@ sub www_editDatabaseLink {
 		-hoverHelp => $i18n->get('allowed keywords description'),
 		-value => $db{allowedKeywords},
 	);
-        $f->yesNo(
+    $f->yesNo(
 		-name => "allowMacroAccess",
 		-label => $i18n->get('allow access from macros'),
-                -defaultValue=>0,
+		-hoverHelp => $i18n->get('allow access from macros help'),
+        -defaultValue=>0,
 		-value => $db{allowMacroAccess},
 	);
+    $f->textarea(
+		-name => "additionalParameters",
+		-label => $i18n->get('additional parameters'),
+		-hoverHelp => $i18n->get('additional parameters help'),
+        -defaultValue=>'',
+		-value => $db{additionalParameters},
+	);
 	$f->submit;
 	$output .= $f->print;
         return _submenu($session,$output,"990");
@@ -228,7 +236,8 @@ sub www_editDatabaseLinkSave {
 		DSN=>$session->form->process("DSN"),
 		allowedKeywords=>$allowedKeywords,
 		allowMacroAccess=>$session->form->process("allowMacroAccess"),
-		};
+		additionalParameters=>$session->form->process("additionalParameters"),
+    };
 	if ($session->form->process("dlid") eq "new") {
 		WebGUI::DatabaseLink->create($session,$params);
 	} else {