In #7771, the Apache configurator gained the ability to identify what
version of OpenSSL Apache's ssl_module is linked against. However, the
detection was only functional if the module was built as a DSO (which is
almost always the case).
This commit covers the case where the ssl_module is statically linked
within the Apache binary. It requires the user to specify the path to
the binary (with --apache-bin) and emits a warning if static linking is
detected but no path has been provided.