Intended to run as a login event and as a bbs.exec_xtrn() wrapper, this
will track new doors, and doors which have had activity since you last
played.

To set up the login event:
SCFG -> External Programs -> Fixed Events -> Logon Event
	"*../xtrn/doorscan/doorscan.js scan"

The modification to exec/xtrn_sec.js:
At around line 136:
//bbs.exec_xtrn(xtrn_area.sec_list[xsec].prog_list[i].code);
try {
	load("../xtrn/doorscan/doorscan.js","run",xtrn_area.sec_list[xsec].prog_list[i].code);
}
catch(e) {
	log("Error running "+xtrn_area.sec_list[xsec].prog_list[i].code+" "+e);
}