Fix the static-only Unix makefile, it was referencing the 'botan_config' variable which was not set; it should have been 'botan-config'.
Fix the static-only Unix makefile, it was referencing the 'botan_config'
variable which was not set; it should have been 'botan-config'.

Rohde-Schwarz-Cybersecurity/botan,randombit/botan,Rohde-Schwarz-Cybersecurity/botan,randombit/botan,webmaster128/botan,webmaster128/botan,webmaster128/botan,randombit/botan,Rohde-Schwarz-Cybersecurity/botan,webmaster128/botan,Rohde-Schwarz-Cybersecurity/botan,Rohde-Schwarz-Cybersecurity/botan,randombit/botan,randombit/botan,webmaster128/botan,Rohde-Schwarz-Cybersecurity/botan