OpenVPN: Mark unsecure ciphers and DH-parameter as 'weak' in WUI menu

OpenVPN: Mark unsecure ciphers and DH-parameter as 'weak' in WUI menu

64 bit block ciphers like Blowfish, TDEA and CAST5 are vulnerable to the so called 'Birthday attacks' .
    Infos for 'Sweet32' Birthday attacks can be found in here
        https://sweet32.info/ .
    An Overview of 64 bit clock ciphers can also be found in here
        http://en.citizendium.org/wiki/Block_cipher/Catalogs/Cipher_list#64-bit_blocks

1024 bit Diffie-Hellman parameter has also been marked as weak causing the 'Logjam Attack' .
   Infos for 'Logjam Attack' can be found in here
        https://weakdh.org/ .

Signed-off-by: Erik Kapfer <erik.kapfer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>