New interface `trac.attachment.ILegacyAttachmentPolicyDelegate` added.
New interface `trac.attachment.ILegacyAttachmentPolicyDelegate` added.

This enables plugin to benefit from the !LegacyAttachmentPolicy handling of attachment permissions, without having to write their own `IPermissionPolicy` implementation.
pkdevbox/trac,pkdevbox/trac,pkdevbox/trac,pkdevbox/trac