* tests.com: Add the symbol openssl_conf, so the openssl application

  stops complaining about a missing configuration file.  Define the logical
  name PERL_ENV_TABLES with values to Perl considers the DCL symbol table
  as part of the environment (see 'man perlvms' for details), so cms-test.pl
  can get the value of EXE_DIR from tests.com, among others.
* cms-test.pl: Make changes to have it work on VMS as well.  Upper or mixed
  case options need to be quoted and the openssl command needs a VMS-specific
  treatment.  It all should work properly on Unix, I hope it does on Windows
  as well...