Add validators to kore, specified in the configuration using 'validator' keyword.

Example:
	validator	v_id	function	v_id_function
	validator	v_url	regex		^/url/path/[a-z]*$

You can then call these using kore_validator_run(char *, char *), example:

	if (!kore_validator_run("v_url", req->path))
		[req->path is bad];