Fixed: Deleting the attachment deletes the  recepients too (bug#10334).
Squashed commit of the following:

commit 659c42686f319595d61d17f0be82c4974cde6212
Author: s7design <otrs@s7designcreative.com>
Date:   Fri Mar 14 15:06:05 2014 +0100

    [Bug 10334] Deleting the attachment deletes the recepients , too

    Changed wrong  variable in  AgentTicketForvard.dtl, and added increment counter for Customer for MultipleCustomerTo/ MultipleCustomerCc/ MultipleCustomerBcc

Conflicts:
	Kernel/Output/HTML/Standard/AgentTicketForward.dtl