- nsf.c, NsfForwardMethod(): Make sure that a 2nd argument is available
for prepending the methodprefix. Earlier, NSF crashed in case of a
missing 2nd arg.
- Added some basic tests on -methodprefix.
Merge branch 'master' of ssh://alice.wu-wien.ac.at/usr/local/src/git-repo/nsf
Adding a todo
Addding doc fragment about require method
- renamed "-methodprefix" to "-prefix" in nx, since the prefix
  can be applied as well applied to a cmd.