Ability to import scan policies

[ghost]

A feature which would be ideal is the ability to the import scan policies into ZAP through zap-cli. Currently, I have to ability to enable sub-categories of scan polices through zap-cli but I wish to set the thresholds for specific tests within each category. For example within the 'Injection' category I want to disable certain tests such as 'SQL Injection' but want to enable 'Server Side Code Injection'. So having the ability to import an scan policy similar to have it's done with the context would be very helpful for management of scan policies.