[2.1] 6.12.4 Network Socket Extension: options property does not define types for Key and value

[sr@ctin.us]

Fwd from: https://github.com/oasis-tcs/cti-stix2/issues/185

 `options` property does not define types for Key and value

dictionary is defined as:

Specifies any options (SO_*) that may be used by the socket, as a  
dictionary. Each key in the dictionary SHOULDâ be a case-preserved  
version of the option name, e.g., âSO_ACCEPTCONNâ. Each key value in  
the dictionary âMUSTâ be the value for the corresponding options key.
But the value's type is not defined in the description. In other  
dictionaries, it defines what types are supported in the value.

Example of another dictionary:

Each key in the dictionary âMUST âbe the name of the header field and  
âSHOULDâ preserve case, e.g., User-Agentâ. The corresponding value for  
each dictionary key âMUSTâ always be a âlistâ of type stringâ to  
support when a header field is repeated.