New creates a CacheModeSetting based on a variety of string options, like "on" and "off".

Possible cache modes.

cache everything, except Amber, Lua, GCSS and Markdown.

cache images (png, jpg, gif, svg).

cache nothing.

cache everything.

cache everything, except Amber and Lua.

only cache small files (<=64KB) // 64 * 1024.

cache mode has not been set.

Names is a map of cache mode setting string representations.

Setting represents a cache mode setting.