node: option -l is no more, listen moved to inetd

We moved the whole listen part in inetd.c, so the code for -l was
removed, but not the option acceptance in getopt()

Signed-off-by: Steve Schnepp <steve.schnepp@pwkf.org>
Merge branch 'fix-inetd'

Signed-off-by: Steve Schnepp <steve.schnepp@pwkf.org>
node: remove extra "extern" opterr

As Helmut suggested:

    In theory that line is totally wrong:
      1) unistd.h claims to ship that declaration
      2) therefore it is a redeclaration on conformant systems
      3) extern declarations in function bodies are not valid C.