Config option for disabled SSL protocols (#720)

In the global config section:
SSLDisabledProtocol = <value1>
SSLDisabledProtocol = <value2>
...

Available values are: None, SSLv2, SSLv3, TLSv1
> Then it should be EDisableProtocol...

Done. That means casting the bitwise OR'd flags back to an enum value...