- patch pppd to support named interfaces (e.g. "pppoe-wan")
- use named interfaces when bringing up 3g, pptp, ppp or pppoe connections
- get rid of unit count logic
- shutdown pppd when ifdown is invoked
- bump package revision
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21283 3c298f89-4303-0410-b956-a3cf2f4a3e73
