Precache CustomLists for `true`'s and `false`'s in config

[amberpixels]

	BoolFromStringsConfig struct {
		Section

		// TODO: precache customListForTrue + CaseInsensitive (so we don't do lower of the list each time)

		CustomListForTrue       []string `toml:"CustomListForTrue"`
		CustomListForFalse      []string `toml:"CustomListForFalse"`
		CaseInsensitive         bool     `toml:"CaseInsensitive"`
		RespectFromNumbersLogic bool     `toml:"RespectFromNumbersLogic"`
	}