a few fixes in prenek for bcs etc. pff.

git-svn-id: https://svn.mcs.anl.gov/repos/nek5/trunk/tools@971 24248562-e74d-0410-ab4b-d4d80c744c73
added 8-byte support for re2 input, it will now be the default for genbox,reatore2, and n2to3. Nek is backwards compatible with the 4-byte re2, of course.  Also added a gen_re2 subroutine to postpro.f

git-svn-id: https://svn.mcs.anl.gov/repos/nek5/trunk/tools@972 24248562-e74d-0410-ab4b-d4d80c744c73
fixed nelf to nelvv in bound.f

git-svn-id: https://svn.mcs.anl.gov/repos/nek5/trunk/tools@973 24248562-e74d-0410-ab4b-d4d80c744c73