Test: AREAFIX-015

Case:
Netmail from a point to areafix to subscribe an area. Message is scanned
out, processed. The area exists and is passive, so a message is sent to
the uplink, the area is connected and a reply is sent to the requester.

Input:
FTN netmail from "Mr Point" at 2:200/111.15 to
"AreaFix" at 2:200/111.0, password "MrPointPwd".
+TEST_AREA in the body.

Output:
*.MSG netmail to uplink
PKT file with reply
