Reinstate the cryptest binary removed in r428022 as it may be useful to some
people. Since it was installed by default before, so it shall be now. It can
be toggled with the TOOLS option. For the regression tests to run, it must be
toggled OFF due to environment restrictions.

While here:

• Switch to plain USES=zip, it extracts fine with base unzip
• Clean up whitespace
• Fix portlint warnings
• Rename LIBVERSION variable to SOVERSION

PR: 222930
Submitted by: Roberto Fernandez Cueto <roberfern@gmail.com>