* Added (cluster-wide) NID offset capability to qswnal

*  Added (cluster-wide) NID offset capability to qswnal

*  Made lctl::mynid accept NIDs specified as a hostname string, a.b.c.d IP
   address, %i and %x (just like the routing commands).  This command now
   works with the qswnal, to tell it its cluster-wide NID offset.  Temp
   hack in lconf to actually do this function when network is 'elan' as
   well as 'tcp' or 'toe'.

*  Added lctl::shownid (no args) to print the NID