Windows makefile.bat fixes:

1. Fix infinite recursion for 'all' type builds (i.e. runjobs builds): I forgot to initialize my variables before calling the :parse_args loop! Oops!

2. Fix to setting of SolutionDir variable: cannot do simple "set var=". Need to use ":re_set" subroutine instead (due to potention parentheses in dir/path name).
Back-out accidental qeth.c commit (I didn't mean to commit that!)