- avoids old values if the read from /proc/.../status somehow failed

- To-do:
      wmake/rules/General/bison
      wmake/rules/General/btyacc
      wmake/rules/General/btyacc++
      wmake/rules/General/byacc
      wmake/rules/General/moc
      wmake/rules/General/yacc

  but these files have <TAB>

This reverts commit d7d88b7d.

- ThirdParty Allwmake now handles SYSTEMOPENMPI directly without this
  kludge

- for situations where a list of strings/words is more useful than a
  raw array of C-strings

not entirely satisfactory