* Things to do *
-1. Support dial-on-demand in PPP
+- How should we handle the case where MTU > MRU?
+ Should we reduce the IP MTU to the link MRU (so TCP MSS is correct)?
-2. Implement link quality monitoring
+- Provide ways to:
+ + set the IP address, possibly based on the peer's identity
+ + have external checking of PAP user/password, CHAP response
+ + supply the PAP user/password, CHAP secret
+ + decide which tty to use (locking, DTR issues)
-3. Implement other network control protocols
+- Integrate callback stuff?
+
+- Implement link quality monitoring
+
+- Implement other network control protocols