G4 : Service routines

G4a:	Problem input (e.g., matrix generation)	(3 routines)
G4b:	Problem scaling	(0 routines)
G4c:	Check user-supplied derivatives	(4 routines)
G4d:	Find feasible point	(13 routines)
G4e:	Check for redundancy	(0 routines)
G4f:	Other	(60 routines)