pptp down script fixes

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@23966 52c4871e-980c-0410-b1e0-e73912ce01f8
Ticket 3397 : TCPMSS taget is only valid in the netfilter mangle table
http://svn.dd-wrt.com/ticket/3397

- Move rule to mangle table



git-svn-id: svn://svn.dd-wrt.com/DD-WRT@23967 52c4871e-980c-0410-b1e0-e73912ce01f8
TCPMSS taget is only valid in the netfilter mangle table
http://svn.dd-wrt.com/ticket/3397#comment:1

- remove obsolete clamping rules
- fix compile error



git-svn-id: svn://svn.dd-wrt.com/DD-WRT@23968 52c4871e-980c-0410-b1e0-e73912ce01f8
added translations

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@23969 52c4871e-980c-0410-b1e0-e73912ce01f8