comms/kermit: the port had been updated and cleaned up (+)

• Update C-Kermit to version 9.0.305 Alpha.04 which integrates both modern and legacy OpenSSL support (thus drop our local patch)
• Do not install essentially empty dot-files as examples; they also contain references to full *.ini files which are no longer shipped as part of the C-Kermit distribution
• The only useful documentation now is README.TXT, install it in the dedicated option helper target